Leonid, the Packleader

+1: Put a 2/2 white Cat creature token onto the battlefield.
-2: Put a +1/+1 counter on up to one target creature. You gain life equal to the number of creatures with +1/+1 counter on it you control.
-6: Destroy all other permanents except for lands and tokens. You gain life equal to the numer of permanents destroyed this way.