Tarken, Scum of Hell

+2: Choose: Every player takes 3 damage or every creature takes 5 damage.
-7: Get an emblem that says, "Every creature you control has deathtouch and +1/+1. On every player's turn that player looses 3 life except for yours.
-15: Destroy every other players' creatures and 2 creatures you control get +30/+30 and vigilance until the end of your next turn.