Luck (XC2)

This article is about the stat in Xenoblade Chronicles 2. For the stat in Xenosaga Episode III, see Luck (XS3).

Luck is a stat in Xenoblade Chronicles 2 and Torna ~ The Golden Country. It affects the likelihood a character will successfully land or resist a debuff or reaction, and affects the chance of pulling rare Blades and dropping rare items. It is generally a property of Drivers and enemies.

Party member luck can be increased by levelling up, equipping accessories that increase luck, using Blades that passively increase luck, or unlocking Driver Skills that increase luck.

Debuff and reaction resistance

When a character uses an attack which inflicts a debuff or reaction, and assuming the target is not immune, the debuff or reaction has a chance of being resisted. This is affected by the luck of the characters in question. In absence of other modifiers:

debuffChance = (1 - targetResistance) + sqrt(sourceLuck) - sqrt(targetLuck)

where targetResistance is the base resistance of the target to the debuff/reaction (most relevant in the case of enemy break resistance), sourceLuck is the luck of the attacker, and targetLuck is the luck of the target.

As the resistance modifiers scale with the square root of luck, flat increases to luck give diminishing returns. Multiplicative increases to luck do not, but the square root still results in a weak effect; doubling luck only results in 1.4 times the effect.

Rare Blade chance

If a Driver has higher luck, they have a greater chance of pulling a rare Blade from a Core Crystal. In absence of other modifiers:

rareRate = baseRate * ((sqrt(luck) / 100 * 1.3) + 0.95)

Again, this scales with the square root of luck; the maximum luck of 999 results in approximately a 1.36x chance of pulling a rare Blade. See Core Crystal#Complete formula for details.

Item drop rate

The drop rate of items is affected by the party's luck. Specifically, it is multiplied by the following value, where partyLuck is the sum of the luck stats of all active party members:

itemDropRate *= max(0.02 * sqrt(partyLuck) + 0.85, 1)

As a result, there is no effect when the total is 56 or less, while at the max of 2997 (all three party members have 999 luck) the multiplier is about 1.94.

Luck values

Each character's luck increases by the same amount (ignoring rounding effects) each level up.

Xenoblade Chronicles 2

Character	Min value (level 1)	Max value (level 99)
Rex	15	366
Nia	18	363
Zeke	23	328
Tora	12	404
Vandham	34	343
Mòrag	20	340
Jin (chapter 1)	43	430
Malos	40	399
Jin (chapter 8)	43	430
Jin (Titan Battleship Assault)	43	430

Torna ~ The Golden Country

Character	Min value (level 1)	Max value (level 99)
Lora	15	366
Addam	23	328
Hugo	20	340
Jin	15	366
Haze	15	366
Mythra	23	328
Minoth	23	328
Brighid	20	340
Aegaeon	20	340