Wipe From History

The target is surrounded by a swirl of golden sands. They
must make a Charisma saving throw. They take 10d10
necrotic damage, or half as much on a successful save. This
damage cannot be reduced or resisted.
If the target fails its saving throw and is reduced to 0 hp by
this damage, they are erased from history. They disappear
entirely and no one but you remembers they ever existed.