Hardening

Per stack, Defense increases by katanaSheathHardeningDefenseBonus. (Max katanaSheathHardeningMaxCount) At max stacks, when you Sheath, Normal Attack is altered by the number of stacks. At this time, damage increases by katanaSheathHardeningAttackStateDamageBonus% for every katanaSheathHardeningAttackStateDamageBonusStatSplitUnit Defense.