Eternal Death

Eternal Deaths are a thief-type undead.

Abilities
Eternal Deaths were excellent undead to use, but they had a passive skill called Aura of Death and Decay which was always activated. That was a potent skill which combined the effects of Ainz’s Despair Aura V (instant death) and Despair Aura I (fear), which made them capable of causing instant death and stat penalties to the enemy. In particular, the stat penalty was not a mind-affecting ability. This allowed it to bypass immunity to mind-affecting effects, which made it very hard to deal with.

That said, if this ability were used under conditions where friendly fire was enabled, it would swiftly paint a hellish picture of suffering and misery.