Illithilich

At the beginning of your upkeep, return target creature card from your graveyard
to the battlefield.
Whenever Illithilich attacks, up to one target creature each get -6/-6 until end of turn.
Madness {3}{b}{b} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)