Threnik, Forgotten King

{w}: Exile target permanent card in a graveyard.
You gain 1 life.
{1}{u}: Exile Threnik. Return him to the battlefield
at the beginning of the next end step.
{2}{b}: Create a 1/1 black Rat creature token with deathtouch.
{3}{r}: Discard up to two cards, then draw that
many cards.
{4}{g}: Creatures you control get +1/+1 and gain trample until end of turn.