Aux Core

Aux Cores are items in Xenoblade Chronicles 2 and Torna ~ The Golden Country that can be equipped to Blades to provide certain advantages, such as increasing damage, evasion rate, and block chance, depending on certain conditions, or providing damage reduction from certain elements or spike damage. Certain Aux Cores also act as costumes, changing the user's appearance in gameplay and most cutscenes.

Aux Cores are available in two forms, an unrefined form and a refined form. Unrefined Aux Cores are unusable and must be refined, by using collectibles at Aux Core shops found in every nation of Alrest, before they can be equipped to a Blade. Which and how many collectibles are needed to refine an Aux Core depends on its effect and its rank: some only need a general "five rare collectibles" or "eight insect collectibles", while others require an exact list of specific items. Despite being refined at a "shop", there is no overhead cost beyond the necessary collectibles.

The number of Aux Cores that can be equipped to a Blade depends on the number of Aux Core slots said Blade has, with the maximum of slots being three. The amount of Aux Core slots is character-specific for Rare and Legendary Blades, and is random for Common Blades. If two Aux Cores have the same-worded effect, or both change the appearance of the user, only one of them can be equipped at a time.

Sources

In Xenoblade Chronicles 2

In Xenoblade Chronicles 2, only unrefined Aux Cores can be found or given as rewards, with the exception of appearance-changing Aux Cores. Unrefined and appearance-changing Aux Cores can be acquired in many ways:

• Quests - Many quests have unrefined Aux Cores as a reward.
• Merc Missions - Many Merc Missions have unrefined Aux Cores as their first time completion reward.
• Treasure troves - Many non-salvaged treasure troves contain unrefined Aux Cores.
• NPCs - Some NPCs will give unrefined Aux Cores after talking to them or performing some actions.
• In Challenge Battle Mode, rank VI unrefined Aux Cores, which cannot be found anywhere else, can be found inside the treasure troves given as rewards after completing challenge battles.
• The Massive Melee Mythra Aux Core can be received from Brobro, while the rest of the appearance-changing Aux Cores can be exchanged for Noponstone or Flawless Noponstone at Noponstone Exchange.

In Torna ~ The Golden Country

In Torna ~ The Golden Country, Aux Cores no longer need to be refined and can instead be found in treasure troves, given by NPCs, or given as a reward for completing quests. Additionally, a specific Aux Core will be awarded upon completing a Blade's Affinity Chart.

Rank

Aux Cores come in six ranks, with rank I being the weakest, and rank VI being the most powerful. Each rank's effect is set, meaning that there is no variation between two Aux Cores of the same type and rank. The unrefined Aux Core's rank directly translates to the refined Aux Core's, as such an unrefined Affinity MAX Atk II Aux Core will always be refined into an Affinity MAX Atk II Aux Core. Some Aux Cores do not come in ranks.

Mechanically, the concept of "rank" is merely a decoration. Aux Cores do not know what "rank" they are aside from whatever happens to be in their name.

List of Aux Cores

Name	Rarity	Price (unrefined)	Price (refined)	Effect
Critical Up I		700 G	900 G	Boosts critical hit rate by 10%.
Critical Up II		1800 G	2300 G	Boosts critical hit rate by 12%.
Critical Up III		2800 G	3600 G	Boosts critical hit rate by 15%.
Critical Up IV		3500 G	4600 G	Boosts critical hit rate by 17%.
Critical Up V		3800 G	4900 G	Boosts critical hit rate by 20%.
Physical Defense Up I		700 G	900 G	Boosts physical defense by 10%.
Physical Defense Up II		1900 G	2500 G	Boosts physical defense by 12%.
Physical Defense Up III		3100 G	4000 G	Boosts physical defense by 15%.
Physical Defense Up IV		5200 G	6800 G	Boosts physical defense by 17%.
Physical Defense Up V		5700 G	7400 G	Boosts physical defense by 20%.
Ether Defense Up I		1000 G	1300 G	Boosts ether defense by 10%.
Ether Defense Up II		2700 G	3500 G	Boosts ether defense by 12%.
Ether Defense Up III		4200 G	5500 G	Boosts ether defense by 15%.
Ether Defense Up IV		5200 G	6800 G	Boosts ether defense by 17%.
Ether Defense Up V		5700 G	7400 G	Boosts ether defense by 20%.
Block Rate Up I		800 G	900 G	Boosts block rate by 10%.
Block Rate Up II		2200 G	2400 G	Boosts block rate by 12%.
Block Rate Up III		3500 G	3900 G	Boosts block rate by 15%.
Block Rate Up IV		4300 G	4700 G	Boosts block rate by 17%.
Block Rate Up V		4700 G	5200 G	Boosts block rate by 20%.
Beast Hunter I		500 G	600 G	Increases damage dealt to beasts by 20%.
Beast Hunter II		1300 G	1400 G	Increases damage dealt to beasts by 25%.
Beast Hunter III		2100 G	2300 G	Increases damage dealt to beasts by 30%.
Beast Hunter IV		2600 G	2900 G	Increases damage dealt to beasts by 35%.
Beast Hunter V		2800 G	3100 G	Increases damage dealt to beasts by 40%.
Insect Hunter I		300 G	300 G	Increases damage dealt to insects by 20%.
Insect Hunter II		900 G	1000 G	Increases damage dealt to insects by 25%.
Insect Hunter III		1600 G	1800 G	Increases damage dealt to insects by 30%.
Insect Hunter IV		2100 G	2300 G	Increases damage dealt to insects by 35%.
Insect Hunter V		2800 G	3100 G	Increases damage dealt to insects by 40%.
Aerial Hunter I		500 G	600 G	Increases damage dealt to aerial creatures by 20%.
Aerial Hunter II		1300 G	1400 G	Increases damage dealt to aerial creatures by 25%.
Aerial Hunter III		2100 G	2300 G	Increases damage dealt to aerial creatures by 30%.
Aerial Hunter IV		2600 G	2900 G	Increases damage dealt to aerial creatures by 35%.
Aerial Hunter V		2800 G	3100 G	Increases damage dealt to aerial creatures by 40%.
Aquatic Hunter I		300 G	300 G	Increases damage dealt to aquatic organisms by 20%.
Aquatic Hunter II		900 G	1000 G	Increases damage dealt to aquatic organisms by 25%.
Aquatic Hunter III		1600 G	1800 G	Increases damage dealt to aquatic organisms by 30%.
Aquatic Hunter IV		2100 G	2300 G	Increases damage dealt to aquatic organisms by 35%.
Aquatic Hunter V		2800 G	3100 G	Increases damage dealt to aquatic organisms by 40%.
Humanoid Hunter I		500 G	600 G	Increases damage dealt to humanoids by 20%.
Humanoid Hunter II		1300 G	1400 G	Increases damage dealt to humanoids by 25%.
Humanoid Hunter III		2100 G	2300 G	Increases damage dealt to humanoids by 30%.
Humanoid Hunter IV		2600 G	2900 G	Increases damage dealt to humanoids by 35%.
Humanoid Hunter V		2800 G	3100 G	Increases damage dealt to humanoids by 40%.
Machine Hunter I		300 G	300 G	Increases damage dealt to machines by 20%.
Machine Hunter II		900 G	1000 G	Increases damage dealt to machines by 25%.
Machine Hunter III		1600 G	1800 G	Increases damage dealt to machines by 30%.
Machine Hunter IV		2100 G	2300 G	Increases damage dealt to machines by 35%.
Machine Hunter V		2800 G	3100 G	Increases damage dealt to machines by 40%.
Titan Hunter I		300 G	300 G	Increases damage dealt to Titans by 20%.
Titan Hunter II		900 G	1000 G	Increases damage dealt to Titans by 25%.
Titan Hunter III		1600 G	1800 G	Increases damage dealt to Titans by 30%.
Titan Hunter IV		2100 G	2300 G	Increases damage dealt to Titans by 35%.
Titan Hunter V		2800 G	3100 G	Increases damage dealt to Titans by 40%.
Blade Combo Boost I		1000 G	1500 G	Increases Blade Combo damage by 10%.
Blade Combo Boost II		2700 G	4100 G	Increases Blade Combo damage by 15%.
Blade Combo Boost III		4200 G	6300 G	Increases Blade Combo damage by 20%.
Blade Combo Boost IV		5200 G	7800 G	Increases Blade Combo damage by 25%.
Blade Combo Boost V		5700 G	8600 G	Increases Blade Combo damage by 30%.
Blade Combo Boost VI		6300 G	9500 G	Increases Blade Combo damage by 36%.
Fusion Combo Up I		400 G	500 G	Boosts Fusion Combo effect by 10%
Fusion Combo Up II		1300 G	1700 G	Boosts Fusion Combo effect by 15%
Fusion Combo Up III		2100 G	2700 G	Boosts Fusion Combo effect by 20%
Fusion Combo Up IV		3500 G	4600 G	Boosts Fusion Combo effect by 25%
Fusion Combo Up V		3800 G	4900 G	Boosts Fusion Combo effect by 30%
Ambush Boost I		300 G	300 G	Increases damage dealt by a surprise attack by 60%.
Ambush Boost II		900 G	1000 G	Increases damage dealt by a surprise attack by 70%.
Ambush Boost III		1400 G	1500 G	Increases damage dealt by a surprise attack by 80%.
Ambush Boost IV		1700 G	1900 G	Increases damage dealt by a surprise attack by 90%.
Ambush Boost V		1900 G	2100 G	Increases damage dealt by a surprise attack by 100%.
Reflect Immunity		200 G	200 G	Annuls reflect.
Reflect Immunity		600 G	700 G	Annuls reflect.
Reflect Immunity		1000 G	1100 G	Annuls reflect.
Reflect Immunity		1700 G	1900 G	Annuls reflect.
Reflect Immunity		1900 G	2100 G	Annuls reflect.
Aggro Attack Up I		1000 G	1500 G	Increases damage dealt to enemies targeting user by 10%.
Aggro Attack Up II		2700 G	4100 G	Increases damage dealt to enemies targeting user by 15%.
Aggro Attack Up III		4200 G	6300 G	Increases damage dealt to enemies targeting user by 20%.
Aggro Attack Up IV		5200 G	7800 G	Increases damage dealt to enemies targeting user by 25%.
Aggro Attack Up V		5700 G	8600 G	Increases damage dealt to enemies targeting user by 30%.
Indoor Attack Up I		300 G	300 G	Increases damage dealt indoors by 20%.
Indoor Attack Up II		900 G	1000 G	Increases damage dealt indoors by 25%.
Indoor Attack Up III		1600 G	1800 G	Increases damage dealt indoors by 30%.
Indoor Attack Up IV		2600 G	2900 G	Increases damage dealt indoors by 35%.
Indoor Attack Up V		2800 G	3100 G	Increases damage dealt indoors by 40%.
Outdoor Attack Up I		500 G	600 G	Increases damage dealt outdoors by 20%.
Outdoor Attack Up II		1300 G	1400 G	Increases damage dealt outdoors by 25%.
Outdoor Attack Up III		2100 G	2300 G	Increases damage dealt outdoors by 30%.
Outdoor Attack Up IV		2600 G	2900 G	Increases damage dealt outdoors by 35%.
Outdoor Attack Up V		2800 G	3100 G	Increases damage dealt outdoors by 40%.
Fire Def Up I		400 G	400 G	Reduces fire damage received by 10%.
Fire Def Up II		1300 G	1400 G	Reduces fire damage received by 15%.
Fire Def Up III		2100 G	2300 G	Reduces fire damage received by 20%.
Fire Def Up IV		2800 G	3100 G	Reduces fire damage received by 25%.
Fire Def Up V		3500 G	3900 G	Reduces fire damage received by 30%.
Water Def Up I		400 G	400 G	Reduces water damage received by 10%.
Water Def Up II		1300 G	1400 G	Reduces water damage received by 15%.
Water Def Up III		2100 G	2300 G	Reduces water damage received by 20%.
Water Def Up IV		2800 G	3100 G	Reduces water damage received by 25%.
Water Def Up V		3500 G	3900 G	Reduces water damage received by 30%.
Earth Def Up I		400 G	400 G	Reduces earth damage received by 10%.
Earth Def Up II		1300 G	1400 G	Reduces earth damage received by 15%.
Earth Def Up III		2100 G	2300 G	Reduces earth damage received by 20%.
Earth Def Up IV		2800 G	3100 G	Reduces earth damage received by 25%.
Earth Def Up V		3500 G	3900 G	Reduces earth damage received by 30%.
Wind Def Up I		400 G	400 G	Reduces wind damage received by 10%.
Wind Def Up II		1300 G	1400 G	Reduces wind damage received by 15%.
Wind Def Up III		2100 G	2300 G	Reduces wind damage received by 20%.
Wind Def Up IV		2800 G	3100 G	Reduces wind damage received by 25%.
Wind Def Up V		3500 G	3900 G	Reduces wind damage received by 30%.
Electric Def Up I		400 G	400 G	Reduces electric damage received by 10%.
Electric Def Up II		1300 G	1400 G	Reduces electric damage received by 15%.
Electric Def Up III		2100 G	2300 G	Reduces electric damage received by 20%.
Electric Def Up IV		2800 G	3100 G	Reduces electric damage received by 25%.
Electric Def Up V		3500 G	3900 G	Reduces electric damage received by 30%.
Ice Def Up I		400 G	400 G	Reduces ice damage received by 10%.
Ice Def Up II		1300 G	1400 G	Reduces ice damage received by 15%.
Ice Def Up III		2100 G	2300 G	Reduces ice damage received by 20%.
Ice Def Up IV		2800 G	3100 G	Reduces ice damage received by 25%.
Ice Def Up V		3500 G	3900 G	Reduces ice damage received by 30%.
Dark Def Up I		400 G	400 G	Reduces dark damage received by 10%.
Dark Def Up II		1300 G	1400 G	Reduces dark damage received by 15%.
Dark Def Up III		2100 G	2300 G	Reduces dark damage received by 20%.
Dark Def Up IV		2800 G	3100 G	Reduces dark damage received by 25%.
Dark Def Up V		3500 G	3900 G	Reduces dark damage received by 30%.
Light Def Up I		400 G	400 G	Reduces light damage received by 10%.
Light Def Up II		1300 G	1400 G	Reduces light damage received by 15%.
Light Def Up III		2100 G	2300 G	Reduces light damage received by 20%.
Light Def Up IV		2800 G	3100 G	Reduces light damage received by 25%.
Light Def Up V		3500 G	3900 G	Reduces light damage received by 30%.
Ultimate Shield		4200 G	6300 G	On Block, gives 50% chance to completely deflect enemy attack.
Fire Absorb		3500 G	5300 G	On Block, Fire damage is absorbed, restoring HP instead of taking damage.
Water Absorb		3500 G	5300 G	On Block, Water damage is absorbed, restoring HP instead of taking damage.
Earth Absorb		3500 G	5300 G	On Block, Earth damage is absorbed, restoring HP instead of taking damage.
Wind Absorb		3500 G	5300 G	On Block, Wind damage is absorbed, restoring HP instead of taking damage.
Electric Absorb		3500 G	5300 G	On Block, Electric damage is absorbed, restoring HP instead of taking damage.
Ice Absorb		3500 G	5300 G	On Block, Ice damage is absorbed, restoring HP instead of taking damage.
Dark Absorb		3500 G	5300 G	On Block, Dark damage is absorbed, restoring HP instead of taking damage.
Light Absorb		3500 G	5300 G	On Block, Light damage is absorbed, restoring HP instead of taking damage.
Fire Reflect		3800 G	4900 G	On Block, Fire damage is reflected, damaging the enemy instead.
Water Reflect		3800 G	4900 G	On Block, Water damage is reflected, damaging the enemy instead.
Earth Reflect		3800 G	4900 G	On Block, Earth damage is reflected, damaging the enemy instead.
Wind Reflect		3800 G	4900 G	On Block, Wind damage is reflected, damaging the enemy instead.
Electric Reflect		3800 G	4900 G	On Block, Electric damage is reflected, damaging the enemy instead.
Ice Reflect		3800 G	4900 G	On Block, Ice damage is reflected, damaging the enemy instead.
Dark Reflect		3800 G	4900 G	On Block, Dark damage is reflected, damaging the enemy instead.
Light Reflect		3800 G	4900 G	On Block, Light damage is reflected, damaging the enemy instead.
Evasion Focus I		700 G	900 G	Improves evasion by 10% when HP is 30% or lower.
Evasion Focus II		1300 G	1700 G	Improves evasion by 15% when HP is 30% or lower.
Evasion Focus III		2100 G	2700 G	Improves evasion by 20% when HP is 30% or lower.
Evasion Focus IV		3500 G	4600 G	Improves evasion by 25% when HP is 30% or lower.
Evasion Focus V		3800 G	4900 G	Improves evasion by 30% when HP is 30% or lower.
Swift Evasion I		700 G	1100 G	Improves evasion by 10% while moving.
Swift Evasion II		1800 G	2700 G	Improves evasion by 15% while moving.
Swift Evasion III		2800 G	4200 G	Improves evasion by 20% while moving.
Swift Evasion IV		3500 G	5300 G	Improves evasion by 25% while moving.
Swift Evasion V		3800 G	5700 G	Improves evasion by 30% while moving.
Emergency Guard I		400 G	400 G	Boosts block rate by 10% when HP is 30% or lower.
Emergency Guard II		1300 G	1400 G	Boosts block rate by 15% when HP is 30% or lower.
Emergency Guard III		2100 G	2300 G	Boosts block rate by 20% when HP is 30% or lower.
Emergency Guard IV		3500 G	3900 G	Boosts block rate by 25% when HP is 30% or lower.
Emergency Guard V		3800 G	4200 G	Boosts block rate by 30% when HP is 30% or lower.
Endurance I		700 G	900 G	Reduces damage taken by 10% when HP is 30% or lower.
Endurance II		1800 G	2300 G	Reduces damage taken by 12% when HP is 30% or lower.
Endurance III		2800 G	3600 G	Reduces damage taken by 15% when HP is 30% or lower.
Endurance IV		3500 G	4600 G	Reduces damage taken by 17% when HP is 30% or lower.
Endurance V		3800 G	4900 G	Reduces damage taken by 20% when HP is 30% or lower.
HP Attack Boost I		700 G	900 G	Increases damage dealt by 10% when HP is 90% or higher.
HP Attack Boost II		1300 G	1700 G	Increases damage dealt by 15% when HP is 90% or higher.
HP Attack Boost III		2100 G	2700 G	Increases damage dealt by 20% when HP is 90% or higher.
HP Attack Boost IV		3500 G	4600 G	Increases damage dealt by 25% when HP is 90% or higher.
HP Attack Boost V		3800 G	4900 G	Increases damage dealt by 30% when HP is 90% or higher.
Spike Defense I		700 G	800 G	Reduces Spike damage taken by 60%.
Spike Defense II		1800 G	2000 G	Reduces Spike damage taken by 70%.
Spike Defense III		2800 G	3100 G	Reduces Spike damage taken by 80%.
Spike Defense IV		3500 G	3900 G	Reduces Spike damage taken by 90%.
Spike Defense V		3800 G	4200 G	Reduces Spike damage taken by 100%.
Break Resist I		900 G	1200 G	Boosts Break resistance by 25%.
Break Resist II		2500 G	3300 G	Boosts Break resistance by 30%.
Break Resist III		4200 G	5500 G	Boosts Break resistance by 35%.
Break Resist IV		6900 G	9000 G	Boosts Break resistance by 40%.
Break Resist V		7600 G	9900 G	Boosts Break resistance by 50%.
Topple Resist I		1200 G	1600 G	Boosts Topple resistance by 25%.
Topple Resist II		3100 G	4000 G	Boosts Topple resistance by 30%.
Topple Resist III		4900 G	6400 G	Boosts Topple resistance by 35%.
Topple Resist IV		6000 G	7800 G	Boosts Topple resistance by 40%.
Topple Resist V		6600 G	8600 G	Boosts Topple resistance by 50%.
Launch Resist I		700 G	900 G	Boosts Launch resistance by 25%.
Launch Resist II		1900 G	2500 G	Boosts Launch resistance by 30%.
Launch Resist III		3100 G	4000 G	Boosts Launch resistance by 35%.
Launch Resist IV		5200 G	6800 G	Boosts Launch resistance by 40%.
Launch Resist V		5700 G	7400 G	Boosts Launch resistance by 50%.
Smash Resist I		700 G	900 G	Boosts Smash resistance by 25%.
Smash Resist II		1800 G	2300 G	Boosts Smash resistance by 30%.
Smash Resist III		2800 G	3600 G	Boosts Smash resistance by 35%.
Smash Resist IV		3500 G	4600 G	Boosts Smash resistance by 40%.
Smash Resist V		3800 G	4900 G	Boosts Smash resistance by 50%.
Blowdown Resist I		300 G	400 G	Boosts Blowdown resistance by 25%.
Blowdown Resist II		900 G	1200 G	Boosts Blowdown resistance by 30%.
Blowdown Resist III		1600 G	2100 G	Boosts Blowdown resistance by 35%.
Blowdown Resist IV		2600 G	3400 G	Boosts Blowdown resistance by 40%.
Blowdown Resist V		2800 G	3600 G	Boosts Blowdown resistance by 50%.
Knockback Resist I		500 G	700 G	Boosts Knockback resistance by 25%.
Knockback Resist II		1300 G	1700 G	Boosts Knockback resistance by 30%.
Knockback Resist III		2100 G	2700 G	Boosts Knockback resistance by 35%.
Knockback Resist IV		2600 G	3400 G	Boosts Knockback resistance by 40%.
Knockback Resist V		2800 G	3600 G	Boosts Knockback resistance by 50%.
Annul Resist I		300 G	300 G	Boosts resistance to defense annulling attacks by 25%.
Annul Resist II		900 G	1000 G	Boosts resistance to defense annulling attacks by 30%.
Annul Resist III		1600 G	1800 G	Boosts resistance to defense annulling attacks by 35%.
Annul Resist IV		2600 G	2900 G	Boosts resistance to defense annulling attacks by 40%.
Annul Resist V		2800 G	3100 G	Boosts resistance to defense annulling attacks by 50%.
Shackle Blade Resist I		700 G	800 G	Boosts Blade shackle resistance by 20%.
Shackle Blade Resist II		1800 G	2000 G	Boosts Blade shackle resistance by 40%.
Shackle Blade Resist III		2800 G	3100 G	Boosts Blade shackle resistance by 60%.
Shackle Blade Resist IV		3500 G	3900 G	Boosts Blade shackle resistance by 80%.
Shackle Blade Resist V		3800 G	4200 G	Boosts Blade shackle resistance by 100%.
Auto-Attack Stealth I		700 G	900 G	Reduces aggro drawn from auto-attacks by 15%.
Auto-Attack Stealth II		1900 G	2500 G	Reduces aggro drawn from auto-attacks by 17%.
Auto-Attack Stealth III		3100 G	4000 G	Reduces aggro drawn from auto-attacks by 20%.
Auto-Attack Stealth IV		5200 G	6800 G	Reduces aggro drawn from auto-attacks by 22%.
Auto-Attack Stealth V		5700 G	7400 G	Reduces aggro drawn from auto-attacks by 25%.
Aggro Boost I		1000 G	1300 G	Increases aggro drawn from auto-attacks by 15%.
Aggro Boost II		2700 G	3500 G	Increases aggro drawn from auto-attacks by 17%.
Aggro Boost III		4200 G	5500 G	Increases aggro drawn from auto-attacks by 20%.
Aggro Boost IV		5200 G	6800 G	Increases aggro drawn from auto-attacks by 22%.
Aggro Boost V		5700 G	7400 G	Increases aggro drawn from auto-attacks by 25%.
Arts Stealth I		700 G	900 G	Reduces aggro drawn from Specials and Driver Arts by 5%.
Arts Stealth II		1900 G	2500 G	Reduces aggro drawn from Specials and Driver Arts by 7%.
Arts Stealth III		3100 G	4000 G	Reduces aggro drawn from Specials and Driver Arts by 10%.
Arts Stealth IV		5200 G	6800 G	Reduces aggro drawn from Specials and Driver Arts by 12%.
Arts Stealth V		5700 G	7400 G	Reduces aggro drawn from Specials and Driver Arts by 15%.
Arts Aggro Boost I		1000 G	1300 G	Increases aggro drawn from Specials and Driver Arts by 5%.
Arts Aggro Boost II		2700 G	3500 G	Increases aggro drawn from Specials and Driver Arts by 7%.
Arts Aggro Boost III		4200 G	5500 G	Increases aggro drawn from Specials and Driver Arts by 10%.
Arts Aggro Boost IV		5200 G	6800 G	Increases aggro drawn from Specials and Driver Arts by 12%.
Arts Aggro Boost V		5700 G	7400 G	Increases aggro drawn from Specials and Driver Arts by 15%.
Arts Heal I		500 G	800 G	Restores 3% HP when using a Driver Art.
Arts Heal II		1600 G	2400 G	Restores 3.5% HP when using a Driver Art.
Arts Heal III		2600 G	3900 G	Restores 4% HP when using a Driver Art.
Arts Heal IV		4300 G	6500 G	Restores 4.5% HP when using a Driver Art.
Arts Heal V		4700 G	7100 G	Restores 5% HP when using a Driver Art.
Movement Heal I		700 G	1100 G	Restores 1% HP every second while moving.
Movement Heal II		1800 G	2700 G	Restores 1.5% HP every second while moving.
Movement Heal III		2800 G	4200 G	Restores 2% HP every second while moving.
Movement Heal IV		3500 G	5300 G	Restores 2.5% HP every second while moving.
Movement Heal V		3800 G	5700 G	Restores 3% HP every second while moving.
Damage Heal I		500 G	800 G	Adds 25% chance of restoring 4% HP after taking a hit.
Damage Heal II		1600 G	2400 G	Adds 25% chance of restoring 6% HP after taking a hit.
Damage Heal III		2600 G	3900 G	Adds 25% chance of restoring 8% HP after taking a hit.
Damage Heal IV		4300 G	6500 G	Adds 25% chance of restoring 10% HP after taking a hit.
Damage Heal V		4700 G	7100 G	Adds 25% chance of restoring 12% HP after taking a hit.
Night Vision I		300 G	300 G	Increases Accuracy during the night by 20%.
Night Vision II		900 G	1000 G	Increases Accuracy during the night by 40%.
Night Vision III		1400 G	1500 G	Increases Accuracy during the night by 60%.
Night Vision IV		1700 G	1900 G	Increases Accuracy during the night by 80%.
Night Vision V		1900 G	2100 G	Increases Accuracy during the night by 100%.
Sunlight Eye I		200 G	200 G	Increases Accuracy during the day by 20%.
Sunlight Eye II		600 G	700 G	Increases Accuracy during the day by 40%.
Sunlight Eye III		1000 G	1100 G	Increases Accuracy during the day by 60%.
Sunlight Eye IV		1700 G	1900 G	Increases Accuracy during the day by 80%.
Sunlight Eye V		1900 G	2100 G	Increases Accuracy during the day by 100%.
Reflect Damage Up I		300 G	400 G	Increases reflect damage by 25%.
Reflect Damage Up II		900 G	1200 G	Increases reflect damage by 50%.
Reflect Damage Up III		1400 G	1800 G	Increases reflect damage by 75%.
Reflect Damage Up IV		1700 G	2200 G	Increases reflect damage by 100%.
Reflect Damage Up V		1900 G	2500 G	Increases reflect damage by 125%.
Range Boost Up I		300 G	300 G	Adds 1m to the range of Ether Cannon.
Range Boost Up II		900 G	1000 G	Adds 2m to the range of Ether Cannon.
Range Boost Up III		1600 G	1800 G	Adds 3m to the range of Ether Cannon.
Range Boost Up IV		2600 G	2900 G	Adds 4m to the range of Ether Cannon.
Range Boost Up V		2800 G	3100 G	Adds 5m to the range of Ether Cannon.
Opening Art I		200 G	200 G	Increases damage dealt by 100% for the first Driver Art per battle.
Opening Art II		600 G	700 G	Increases damage dealt by 125% for the first Driver Art per battle.
Opening Art III		1000 G	1100 G	Increases damage dealt by 150% for the first Driver Art per battle.
Opening Art IV		1700 G	1900 G	Increases damage dealt by 175% for the first Driver Art per battle.
Opening Art V		1900 G	2100 G	Increases damage dealt by 200% for the first Driver Art per battle.
Telepathy I		700 G	1100 G	Increases chance of triggering Blade Arts by 20%.
Telepathy II		1800 G	2700 G	Increases chance of triggering Blade Arts by 40%.
Telepathy III		2800 G	4200 G	Increases chance of triggering Blade Arts by 60%.
Telepathy IV		3500 G	5300 G	Increases chance of triggering Blade Arts by 80%.
Telepathy V		3800 G	5700 G	Increases chance of triggering Blade Arts by 100%.
Helping Hand I		400 G	500 G	Increases Blade Arts duration time by 10%.
Helping Hand II		1300 G	1700 G	Increases Blade Arts duration time by 20%.
Helping Hand III		2100 G	2700 G	Increases Blade Arts duration time by 30%.
Helping Hand IV		3500 G	4600 G	Increases Blade Arts duration time by 40%.
Helping Hand V		3800 G	4900 G	Increases Blade Arts duration time by 50%.
Affinity MAX Barrier I		500 G	600 G	When Affinity reaches max, grant party damage barrier of 10% of max HP.
Affinity MAX Barrier II		1300 G	1400 G	When Affinity reaches max, grant party damage barrier of 15% of max HP.
Affinity MAX Barrier III		2100 G	2300 G	When Affinity reaches max, grant party damage barrier of 20% of max HP.
Affinity MAX Barrier IV		2600 G	2900 G	When Affinity reaches max, grant party damage barrier of 25% of max HP.
Affinity MAX Barrier V		2800 G	3100 G	When Affinity reaches max, grant party damage barrier of 30% of max HP.
Affinity MAX Atk I		700 G	900 G	Increases damage dealt by 30% when Affinity is at max.
Affinity MAX Atk II		1900 G	2500 G	Increases damage dealt by 35% when Affinity is at max.
Affinity MAX Atk III		3100 G	4000 G	Increases damage dealt by 40% when Affinity is at max.
Affinity MAX Atk IV		5200 G	6800 G	Increases damage dealt by 45% when Affinity is at max.
Affinity MAX Atk V		5700 G	7400 G	Increases damage dealt by 50% when Affinity is at max.
Affinity MAX Evade I		1000 G	1500 G	Increases evasion rate by 8% when Affinity is at max.
Affinity MAX Evade II		2700 G	4100 G	Increases evasion rate by 10% when Affinity is at max.
Affinity MAX Evade III		4200 G	6300 G	Increases evasion rate by 12% when Affinity is at max.
Affinity MAX Evade IV		5200 G	7800 G	Increases evasion rate by 14% when Affinity is at max.
Affinity MAX Evade V		5700 G	8600 G	Increases evasion rate by 16% when Affinity is at max.
Hunter's Chemistry I		300 G	300 G	Increases Affinity by 150 when starting a battle with the initiative.
Hunter's Chemistry II		900 G	1000 G	Increases Affinity by 175 when starting a battle with the initiative.
Hunter's Chemistry III		1600 G	1800 G	Increases Affinity by 200 when starting a battle with the initiative.
Hunter's Chemistry IV		2600 G	2900 G	Increases Affinity by 225 when starting a battle with the initiative.
Hunter's Chemistry V		2800 G	3100 G	Increases Affinity by 250 when starting a battle with the initiative.
Shoulder to Shoulder I		500 G	600 G	Increases Affinity by 150 when the enemy starts with the initiative.
Shoulder to Shoulder II		1300 G	1400 G	Increases Affinity by 175 when the enemy starts with the initiative.
Shoulder to Shoulder III		2100 G	2300 G	Increases Affinity by 200 when the enemy starts with the initiative.
Shoulder to Shoulder IV		2600 G	2900 G	Increases Affinity by 225 when the enemy starts with the initiative.
Shoulder to Shoulder V		2800 G	3100 G	Increases Affinity by 250 when the enemy starts with the initiative.
Fast Blade Switch I		900 G	1400 G	Reduces the cooldown time for a Blade Switch by 10%.
Fast Blade Switch II		2500 G	3800 G	Reduces the cooldown time for a Blade Switch by 15%.
Fast Blade Switch III		4200 G	6300 G	Reduces the cooldown time for a Blade Switch by 20%.
Fast Blade Switch IV		6900 G	10400 G	Reduces the cooldown time for a Blade Switch by 25%.
Fast Blade Switch V		7600 G	11400 G	Reduces the cooldown time for a Blade Switch by 30%.
Fast Blade Switch VI		8400 G	12600 G	Reduces the cooldown time for a Blade Switch by 35%.
Specials Lv 1 Plus I		700 G	800 G	Increases Lv 1 Special damage by 20%.
Specials Lv 1 Plus II		1800 G	2000 G	Increases Lv 1 Special damage by 30%.
Specials Lv 1 Plus III		2800 G	3100 G	Increases Lv 1 Special damage by 40%.
Specials Lv 1 Plus IV		3500 G	3900 G	Increases Lv 1 Special damage by 50%.
Specials Lv 1 Plus V		3800 G	4200 G	Increases Lv 1 Special damage by 60%.
Specials Lv 2 Plus I		700 G	900 G	Increases Lv 2 Special damage by 20%.
Specials Lv 2 Plus II		1800 G	2300 G	Increases Lv 2 Special damage by 30%.
Specials Lv 2 Plus III		2800 G	3600 G	Increases Lv 2 Special damage by 40%.
Specials Lv 2 Plus IV		3500 G	4600 G	Increases Lv 2 Special damage by 50%.
Specials Lv 2 Plus V		3800 G	4900 G	Increases Lv 2 Special damage by 60%.
Specials Lv 3 Plus I		700 G	1100 G	Increases Lv 3 Special damage by 20%.
Specials Lv 3 Plus II		1800 G	2700 G	Increases Lv 3 Special damage by 30%.
Specials Lv 3 Plus III		2800 G	4200 G	Increases Lv 3 Special damage by 40%.
Specials Lv 3 Plus IV		3500 G	5300 G	Increases Lv 3 Special damage by 50%.
Specials Lv 3 Plus V		3800 G	5700 G	Increases Lv 3 Special damage by 60%.
Specials Lv 4 Plus I		700 G	1100 G	Increases Lv 4 Special damage by 20%.
Specials Lv 4 Plus II		1800 G	2700 G	Increases Lv 4 Special damage by 30%.
Specials Lv 4 Plus III		2800 G	4200 G	Increases Lv 4 Special damage by 40%.
Specials Lv 4 Plus IV		3500 G	5300 G	Increases Lv 4 Special damage by 50%.
Specials Lv 4 Plus V		3800 G	5700 G	Increases Lv 4 Special damage by 60%.
Affinity MAX Acc I		800 G	1000 G	Increases accuracy by 15% at max Affinity.
Affinity MAX Acc II		2200 G	2900 G	Increases accuracy by 20% at max Affinity.
Affinity MAX Acc III		3500 G	4600 G	Increases accuracy by 25% at max Affinity.
Affinity MAX Acc IV		4300 G	5600 G	Increases accuracy by 30% at max Affinity.
Affinity MAX Acc V		4700 G	6100 G	Increases accuracy by 35% at max Affinity.
Jamming I		400 G	500 G	Adds 10% chance of evading ranged attacks.
Jamming II		1300 G	1700 G	Adds 20% chance of evading ranged attacks.
Jamming III		2100 G	2700 G	Adds 30% chance of evading ranged attacks.
Jamming IV		3500 G	4600 G	Adds 40% chance of evading ranged attacks.
Jamming V		3800 G	4900 G	Adds 50% chance of evading ranged attacks.
Element Orb Ender		2700 G	3500 G	Destroys an element orb when hit with an opposing element in a Chain Attack.
Element Orb Prioritizer		1400 G	1500 G	Targets damaged element orbs when not using opposing element in a Chain.
Critical Up VI		4800 G	6200 G	Boosts critical hit rate by 22%.
Physical Defense Up VI		7100 G	9200 G	Boosts physical defense by 22%.
Ether Defense Up VI		7100 G	9200 G	Boosts ether defense by 22%.
Block Rate Up VI		5900 G	6500 G	Boosts block rate by 22%.
Beast Hunter VI		3500 G	3900 G	Increases damage dealt to beasts by 45%.
Insect Hunter VI		3500 G	3900 G	Increases damage dealt to insects by 45%.
Aerial Hunter VI		3500 G	3900 G	Increases damage dealt to aerial creatures by 45%.
Aquatic Hunter VI		3500 G	3900 G	Increases damage dealt to aquatic organisms by 45%.
Humanoid Hunter VI		3500 G	3900 G	Increases damage dealt to humanoids by 45%.
Machine Hunter VI		3500 G	3900 G	Increases damage dealt to machines by 45%.
Titan Hunter VI		3500 G	3900 G	Increases damage dealt to Titans by 45%.
Fusion Combo Up VI		4800 G	6200 G	Boosts Fusion Combo effect by 36%
Ambush Boost VI		2400 G	2600 G	Increases damage dealt by a surprise attack by 110%.
Aggro Attack Up VI		7100 G	10700 G	Increases damage dealt to enemies targeting user by 35%.
Indoor Attack Up VI		3500 G	3900 G	Increases damage dealt indoors by 45%.
Outdoor Attack Up VI		3500 G	3900 G	Increases damage dealt outdoors by 45%.
Fire Def Up VI		4400 G	4800 G	Reduces fire damage received by 35%.
Water Def Up VI		4400 G	4800 G	Reduces water damage received by 35%.
Wind Def Up VI		4400 G	4800 G	Reduces wind damage received by 35%.
Earth Def Up VI		4400 G	4800 G	Reduces earth damage received by 35%.
Electric Def Up VI		4400 G	4800 G	Reduces electric damage received by 35%.
Ice Def Up VI		4400 G	4800 G	Reduces ice damage received by 35%.
Light Def Up VI		4400 G	4800 G	Reduces light damage received by 35%.
Dark Def Up VI		4400 G	4800 G	Reduces dark damage received by 35%.
Evasion Focus VI		4800 G	6200 G	Improves evasion by 35% when HP is 30% or lower.
Swift Evasion VI		4800 G	7200 G	Improves evasion by 35% while moving.
Emergency Guard VI		4800 G	5300 G	Boosts block rate by 35% when HP is 30% or lower.
Endurance VI		4800 G	6200 G	Reduces damage taken by 22% when HP is 30% or lower.
HP Attack Boost VI		4800 G	6200 G	Increases damage dealt by 35% when HP is 90% or higher.
Break Resist VI		9500 G	12400 G	Boosts Break resistance by 60%.
Topple Resist VI		8300 G	10800 G	Boosts Topple resistance by 60%.
Launch Resist VI		7100 G	9200 G	Boosts Launch resistance by 60%.
Smash Resist VI		4800 G	6200 G	Boosts Smash resistance by 60%.
Blowdown Resist VI		3500 G	4600 G	Boosts Blowdown resistance by 60%.
Knockback Resist VI		3500 G	4600 G	Boosts Knockback resistance by 60%.
Auto-Attack Stealth VI		7100 G	9200 G	Reduces aggro drawn from auto-attacks by 30%.
Aggro Boost VI		7100 G	9200 G	Increases aggro drawn from auto-attacks by 30%.
Arts Stealth VI		7100 G	9200 G	Reduces aggro drawn from Specials and Driver Arts by 17%.
Arts Aggro Boost VI		7100 G	9200 G	Increases aggro drawn from Specials and Driver Arts by 17%.
Arts Heal VI		5900 G	8900 G	Restores 5.5% HP when using a Driver Art.
Movement Heal VI		4800 G	7200 G	Restores 3.5% HP every second while moving.
Damage Heal VI		5900 G	8900 G	Adds 25% chance of restoring 14% HP after taking a hit.
Night Vision VI		2400 G	2600 G	Increases Accuracy during the night by 120%.
Sunlight Eye VI		2400 G	2600 G	Increases Accuracy during the day by 120%.
Reflect Damage Up VI		2400 G	3100 G	Increases reflect damage by 150%.
Opening Art VI		2400 G	2600 G	Increases damage dealt by 225% for the first Driver Art per battle.
Affinity MAX Barrier VI		3500 G	3900 G	When Affinity reaches max, grant party damage barrier of 35% of max HP.
Affinity MAX Atk VI		7100 G	9200 G	Increases damage dealt by 55% when Affinity is at max.
Affinity MAX Evade VI		7100 G	10700 G	Increases evasion rate by 18% when Affinity is at max.
Specials Lv 1 Plus VI		4800 G	5300 G	Increases Lv 1 Special damage by 70%.
Specials Lv 2 Plus VI		4800 G	6200 G	Increases Lv 2 Special damage by 70%.
Specials Lv 3 Plus VI		4800 G	7200 G	Increases Lv 3 Special damage by 70%.
Specials Lv 4 Plus VI		4800 G	7200 G	Increases Lv 4 Special damage by 70%.
Affinity MAX Acc VI		5900 G	7700 G	Increases accuracy by 40% at max Affinity.
Jamming VI		4800 G	6200 G	Adds 60% chance of evading ranged attacks.
Disguised Pyra		N/A	1000 G	Boosts Fusion Combo effect by 30% If the user is Pyra, sets their model to bl/bl100101.
Mythra-Style Pyra		N/A	1000 G	Boosts critical hit rate by 20%. If the user is Pyra, sets their model to bl/bl100102.
Pyra-Style Mythra		N/A	1000 G	Increases Blade Combo damage by 30%. If the user is Mythra, sets their model to bl/bl100201.
Savage Dromarch		N/A	1000 G	Reduces aggro drawn from Specials and Driver Arts by 15%. If the user is Dromarch, sets their model to bl/bl100501.
Crimson Orchid Brighid		N/A	1000 G	Increases evasion rate by 16% when Affinity is at max. If the user is Brighid, sets their model to bl/bl101001.
Mermaid-Blue Pandoria		N/A	1000 G	Increases damage dealt by 50% when Affinity is at max. If the user is Pandoria, sets their model to bl/bl100901.
Blue Sky Pyra		N/A	1000 G	Boosts critical hit rate by 20%. If the user is Pyra, sets their model to bl/bl120101.
Carbon Mythra		N/A	1000 G	Increases Blade Combo damage by 30%. If the user is Mythra, sets their model to bl/bl120201.
Obsidian Dromarch		N/A	1000 G	Reduces aggro drawn from Specials and Driver Arts by 15%. If the user is Dromarch, sets their model to bl/bl120501.
Jade Orchid Brighid		N/A	1000 G	Increases evasion rate by 16% when Affinity is at max. If the user is Brighid, sets their model to bl/bl121001.
Magical Pink Pandoria		N/A	1000 G	Increases damage dealt by 50% when Affinity is at max. If the user is Pandoria, sets their model to bl/bl120901.
Pro Swimmer Pyra		N/A	10000 G	Reduces terrain damage by 35%. If the user is Pyra, sets their model to bl/bl110101.
Radiant Beach Mythra		N/A	10000 G	Reduces terrain damage by 35%. If the user is Mythra, sets their model to bl/bl110201.
Water Lily Brighid		N/A	10000 G	Reduces terrain damage by 35%. If the user is Brighid, sets their model to bl/bl111001.
Beach Date Pandoria		N/A	10000 G	Reduces terrain damage by 35%. If the user is Pandoria, sets their model to bl/bl110901.
Loyal Bellflower Nia		N/A	1000 G	Boosts Fusion Combo effect by 36% If the user is Nia, sets their model to bl/bl120401.
Sincere Primrose Nia		N/A	1000 G	Adds 25% chance of restoring 14% HP after taking a hit. If the user is Nia, sets their model to bl/bl120402.
Devoted Marigold Nia		N/A	1000 G	Increases damage dealt by 55% when Affinity is at max. If the user is Nia, sets their model to bl/bl120403.
Massive Melee Mythra		N/A	0 G	Boosts critical hit rate by 25%. If the user is Mythra, sets their model to bl/bl130201.
Massive Melee Mythra		N/A	0 G	Boosts critical hit rate by 25%. If the user is Mythra, sets their model to pc/pc710601.

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See also

• Poppiswap, Poppi's equivalent to Aux Cores.

Gallery

Tutorials

• 

  Tutorial on Aux Cores, part 1

• 

  Tutorial on Aux Cores, part 2

• 

  Tutorial on Aux Cores, part 3

• 

  Tutorial on Aux Cores, part 4

• 

  Tutorial on refining and using Aux Cores, part 5

• 

  Tutorial on refining and using Aux Cores, part 6

• 

  Tutorial on refining and using Aux Cores, part 7

• 

  Tutorial on refining and using Aux Cores, part 8

• 

  Tutorial on refining and using Aux Cores, part 9

• 

  Tutorial on refining and using Aux Cores, part 10

• 

  Tutorial on refining and using Aux Cores, part 11

Screenshots

• 

  The list of unrefined Aux Cores in the Item List

• 

  The list of Aux Cores in the Item List