Tashakar, Holek's Zealot

+3: When you cast a creature spell, you may exile it. Put X +1/+1 where X is the exiled creatures power.
-1: Target player chooses one of your creatures. That creature gets +1/+1 until end of turn.
-7: You exile two creatures. You gain X life and draw X cards where X is the total number of both creatures toughness.