It That Consumes

{2}, sacrifice a creature: You gain 3 life
Whenever you sacrifice a creature, It That
Consumes gets Annihilator 1 until your next end
step. This effect does not stack.
When It That Consumes enters the battlefield,
destroy any number of target nonland permanents,
for the ones you controlled, you gain life equal to
their converted mana costs, and for the ones you
didn't control, you lose life equal to their converted mana costs.
Old hunger pangs drive the bearer into madness if not sated.