According to this Slice Damage deals more damage on opponents who have higher health. It is unclear whether it deals damage based on their maximum or current health, although it seems to be based on their maximum health. The damage dealt is crystal damage according to this thread. This is still pretty strong, if you could buy 5 of these and they all kept the passive, Taka's Kaiten and then Autoattack would kill most low-shield enemies. If the enemy hasn't bought any defensive...