Ainz TGOALID

Then, Ainz’s trump card took effect.
In that moment — the world died.
This was not metaphorical.
Everything died.
The [Einherjar] evaporated into white mist as it couched its lance, and dispersed before Ainz’s eyes. Even a homunculus with no concept of life died instantly. Shalltear’s familiars shared the same fate, unable to resist the destruction which overtook them.
That was not all.
Even the air — which was not even alive to begin with — fell into death. For over one hundred meters in all directions, the air was no longer breathable. If any living creature tried to respire within that area, their lungs would be corrupted by the deadly air, and they would die.
Neither did the land escape the embrace of death. The terrain in a hundredmeter radius was instantly transmuted into sand.
Only Shalltear and Ainz could move in this world, where only death remained.
Ainz’s trump card, [The Goal of All Life is Death], strengthened the effect of instant death magic and skills. Thus augmented, those instant-death effects could bypass any immunities or resistance and kill their targets after a certain
amount of time had passed.

- Overlord; Vol 3; Chapter 5