Imperious, The Lich King

{x}{b}{g}: Return target creature from a graveyard
with an X additional +1/+1 counters.
Whenever a creature you control leaves the battlefield, you may gain life equal to it's power.
"You may have been an enemy before, but now
my student Jarad, we shall show the swarm why I'm called the Lich King!"
-Imperious, The Lich King.