Savage Perversion

Devoid (This card has no color.)
Trample
Riot 2 (You may have Savage Perversion enter the Battlefield with either haste and a +1/+1 counter on it or 2 +1/+1 counters.)
Rupture {1}{g} (whenever you cast this card, you may cast it during your combat phase at instant speed. If you do, remove as many +1/+1 counters from attacking creatures you control. This card costs {1}{g} less to cast for each counter removed this way. You cannot remove more than {g}{g} this way.)