Allows the user to instantly kill a selected enemy unit, provided that the unit would deal at least 1 damage in battle, not including any post-combat skills such as Savage Blow. This skill is ineffective against certain characters.
In Awakening, activating Lethality will not necessarily mean the user will be guaranteed to hit. Since this skill only modifies the next move to be a one-hit kill, it can be avoided like a normal attack. It can also be blocked by Dual Guard/Guard Stance and can be avoided with Miracle.
A Lethality hit can still become a critical hit, despite the fact that the target would be killed anyway.
A Lethality hit can also trigger the target's Pavise or Aegis skill to activate, despite it not having any effect since Lethality will always strike the opponent with an equal amount of damage to that of the targets remaining HP.
If a target survives a Lethality hit with Miracle and either has Counter or Countermagic (which is only available in Fates), it is possible for the attacker to be killed by the reflected damage.
Enemy units will never have Lethality on them, for balancing purposes.