Bolrohm, God of Dread

At the beginning of your end step, as long as your combined devotion to Blue, Black, and Green is more than 10, you may gain control of target creature an opponent controls with a -1/-1 counter on it.
{1}{u}{b}{g} Remove a card in your graveyard from the game: Place a -1/-1 counter on target creature an opponent controls.
In the end, we will all serve him.