Evelilith, Contracted Help

Flying
When Evelilith, Contracted Help enters the battlefield secretly write the name of an opponent
on a piece of paper. Whenever a creature you
control dies, place a soul counter on Evelilith, Contracted Help. At any time on your turn, you
may reveal the secret name and destroy creatures
that opponent controls equal to the number of
soul counters on Evelilith, Contracted Help.