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Theory/Gameplay

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Theory
Theory.png
Driver any
Gender Female
Type Humanoid
Weapon Chroma Katana
This article is about Theory's gameplay in this specific game. For information on the character in general, see Theory.

Theory is a Rare Blade in Xenoblade Chronicles 2.

Stats[edit]

Note: Cooldown time depends on Trust.
General stats
Element Ice Ice
Weapon class XC2 weapon icon Chroma Katana.png Chroma Katana
Default weapon XC2 weapon icon Chroma Katana.png Nameless Katana
Cooldown time 15.00s
Aux Core Slots 2
Merc Group name Purificators
Stat modifiers
Physical defense +20%
Ether defense +30%
Maximum HP +0%
Strength +0%
Ether +0%
Dexterity +0%
Agility +15%
Affinity modifiers
Base affinity 400
Affinity gain -10%
Affinity loss -20%
Favorite items
Categories XC2 item icon Veggies.png Veggies
XC2 item icon Board Games.png Board Games
Items XC2 item icon Veggies.png Steamed Veg Stralu Common
XC2 item icon Cosmetics.png Sparkly Snow Perfume Legendary
Base rarity
Condition Blade has been released
Group 1 1%
Group 2 1%
Group 3 1%
Group 4 1%
Group 5 1%
Pity Blade

Skills[edit]

Specials[edit]

Level Name Description
XC2 menu icon level 1.png Ice Slash After throwing ice knives, attack with slashes.
XC2 menu icon level 2.png Frost Banish Release a powerful somersault kick after three repeat attacks.
XC2 menu icon level 3.png Rebel Sister With one slash, smash an ice pillar and attack enemies over a wide area.
XC2 menu icon level 4.png Winter's Wake Hurl out continuous ice strikes to freeze the enemy in their tracks.

Blade Arts[edit]

Name Probability Recharge Description
Accuracy Up 75% 15s Increases accuracy.
Nullify Reaction 75% 37.5s Nullifies one reaction.

Battle Skills[edit]

Name At level I At level V
Aerial Flashdance Counters attacks with 200% physical damage. Counters attacks with 400% physical damage.
Conviction Increases damage dealt to enemies targeting user by 25%. Increases damage dealt to enemies targeting user by 50%.
Steadfast Boosts Break resistance by 30%. Boosts Break resistance by 70%.

Field Skills[edit]

Name Description
Ice Mastery The power of an Ice Blade.
Focus The power to focus on one thing. Also used to control one's power.
Nopon Wisdom Knowledge related to Nopon. Decode writing, speak Nopon, etc.

Affinity Chart[edit]

Level 1 Level 2 Level 3 Level 4 Level 5
Key affinity condition (unlocked) Increase Trust. (x100) View Heart-to-Heart "Rough Diamond", then go to Uraya's Commercial District and end the quest "Theory and Praxis".
Revealed
  • After the party winds up in Uraya
  • After having access to Nia, Tora, Mòrag, Zeke, and Praxis
At Lyta Oasis, Gormott, view the Heart-to-Heart "Sisterly Love".
Revealed
Increase Trust. (x9,800)
Reward text I think we'll get on well... Big sis looked really happy... The three of us will make many more memories together! Maybe friendship isn't so bad...
Reward Truth XC2 thought icon Truth.png x200 Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x500 Truth XC2 thought icon Truth.png x800
XC2 Affinity Chart icon Blade Special.png
Ice Slash
Effect Increases aggro drawn from Specials by 60%. Increases aggro drawn from Specials by 70%. Increases aggro drawn from Specials by 80%. Increases aggro drawn from Specials by 90%. Increases aggro drawn from Specials by 100%.
Condition (unlocked) Perform a Blade Combo. (x5) Use Ice Slash. (x11) Defeat an Indoline Star at the World Tree. (x4)
Revealed after the party enters the World Tree
Use Ice Slash. (x13)
Reward text Allow me to freeze you solid. This was the right decision...I'm sure. The power will be mine to command. I will grow strong. There will be no more failure. Stand still. This will be wonderful.
Reward Truth XC2 thought icon Truth.png x200 Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x500 Truth XC2 thought icon Truth.png x800
XC2 Affinity Chart icon Blade Special.png
Frost Banish
Effect Increases damage dealt to enemies targeting user by 60%. Increases damage dealt to enemies targeting user by 70%. Increases damage dealt to enemies targeting user by 80%. Increases damage dealt to enemies targeting user by 90%. Increases damage dealt to enemies targeting user by 100%.
Condition (unlocked) Defeat a Gamen Grebel at Spirit Crucible Elpys. (x5)
Revealed after the party enters Spirit Crucible Elpys.
Perform a Driver Combo. (It's enough to just be present.) (x7) Use Frost Banish. (x9) Defeat Impassable Edgar in Tantal. (x1)
Revealed after the party reaches Tantal
Reward text I hate Gamen Grebel... No more, please... I will not fail. You need efficiency to weaken the enemy... Impassable Edgar... It was the perfect opponent to do battle with.
Reward Truth XC2 thought icon Truth.png x200 Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x500 Truth XC2 thought icon Truth.png x800
XC2 Affinity Chart icon Blade Special.png
Rebel Sister
Effect Increases critical damage by 25%. Increases critical damage by 40%. Increases critical damage by 55%. Increases critical damage by 70%. Increases critical damage by 85%.
Condition (unlocked) Use Rebel Sister. (x5) Walk a lot. (x10,000) Perform a Driver Combo. (It's enough to just be present.) (x10) Perform a Blade Combo finisher. (x3)
Reward text I'm improving, I think... You know...I quite enjoyed the journey. I've found a way to freeze an enemy to its very core. May I? Welcome to the world of ice. It's colder than you can imagine...
Reward Truth XC2 thought icon Truth.png x200 Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x500 Truth XC2 thought icon Truth.png x800
Level 1 Level 2 Level 3 Level 4 Level 5
XC2 Affinity Chart icon Blade Skill.png
Aerial Flashdance
Effect Counters attacks with 200% physical damage. Counters attacks with 250% physical damage. Counters attacks with 300% physical damage. Counters attacks with 350% physical damage. Counters attacks with 400% physical damage.
Condition (unlocked) Evade an attack. (x5) Evade an attack. (x7) Evade an attack. (x9) Evade an attack. (x10)
Reward text It's all right. Stay calm and observe the enemy closely. I think I've gotten better at dodging. Let me help you. Dodge and then strike. There's only a small window of opportunity. Are you aiming for a counter?
Reward Truth XC2 thought icon Truth.png x200 Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x500 Truth XC2 thought icon Truth.png x800
XC2 Affinity Chart icon Blade Skill.png
Conviction
Effect Increases damage dealt to enemies targeting user by 25%. Increases damage dealt to enemies targeting user by 30%. Increases damage dealt to enemies targeting user by 35%. Increases damage dealt to enemies targeting user by 40%. Increases damage dealt to enemies targeting user by 50%.
Condition Deal a certain amount of total damage. (x200) Deal a certain amount of total damage. (x8,000) Deal a certain amount of total damage. (x16,000) Deal a certain amount of total damage. (x32,000) Deal a certain amount of total damage. (x48,000)
Reward text I've become stronger. This is only the beginning. Here's where we get serious. It's not over yet. Don't get careless. Let's keep this up. You've helped me come so far... Thank you.
Reward Compassion XC2 thought icon Compassion.png x100 Compassion XC2 thought icon Compassion.png x200 Compassion XC2 thought icon Compassion.png x300 Compassion XC2 thought icon Compassion.png x500 Compassion XC2 thought icon Compassion.png x800
XC2 Affinity Chart icon Blade Skill.png
Steadfast
Effect Boosts Break resistance by 30%. Boosts Break resistance by 40%. Boosts Break resistance by 50%. Boosts Break resistance by 60%. Boosts Break resistance by 70%.
Condition Use Theory's favorite pouch items. (Board Games category) (x2) Block an attack. (x5) Block an attack. (x7) Block an attack. (x9) Block an attack. (x10)
Reward text Do you enjoy playing board games? I find them...OK, I guess. I will support you to the best of my ability. Are you concerned? I won't forgive anyone who tries to hurt you. I have your back. I swear, I will protect you. Don't worry. I won't let you come to any harm.
Reward Truth XC2 thought icon Truth.png x100 Compassion XC2 thought icon Compassion.png x200 Compassion XC2 thought icon Compassion.png x300 Compassion XC2 thought icon Compassion.png x500 Compassion XC2 thought icon Compassion.png x800
Level 1 Level 2 Level 3 Level 4 Level 5
XC2 Affinity Chart icon Field Skill.png
Ice Mastery
Effect The power of an Ice Blade.
Condition (unlocked) Defeat a Dusky Riik at Spirit Crucible Elpys. (x5)
Revealed after the party enters Spirit Crucible Elpys.
Defeat a Kustal Sovereign at the World Tree. (x5)
Revealed after the party enters the World Tree
Reward text I've become quite proficient with ice now. Tell me if you need any ice. I'll turn them into sculptures.
Reward Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x800

XC2 Affinity Chart icon Field Skill.png
Focus
Effect The power to focus on one thing. Also used to control one's power.
Condition (unlocked) Use Theory's favorite pouch items. (Vegetables category) (x4) Use Theory's favorite pouch item from the Vegetables category. (x4)
Reward text Vegetables really aren't bad. Steamed Veg Stralu really...warms you up from the inside.
Reward Justice XC2 thought icon Justice.png x300 Justice XC2 thought icon Justice.png x800
XC2 Affinity Chart icon Field Skill.png
Nopon Wisdom
Effect Knowledge related to Nopon. Decode writing, speak Nopon, etc.
Condition (unlocked) Speak to a Nopon. (x30) Use Theory's favorite pouch items. (Board Games category) (x2)
Reward text How is it that Nopon are irritating, yet lovable creatures? Ah...I could get used to this. This is fun...
Reward Truth XC2 thought icon Truth.png x300 Truth XC2 thought icon Truth.png x800

Dialogue[edit]

Main article: Theory/Gameplay (XC2)/Dialogue

Gallery[edit]