Ill Omen

Target player sacrifices two creatures.
Suspend X - {x}{1}{b}. X can't be 0(Rather than cast
this card from your hand, you may pay {x}{1}{b} and
exile it with X time counters on it. At the beginning of
your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

Whenever a time counter is removed from Ill
Omen, each of your opponents lose 2 life.