Arda, Turtle Hero

+2: Put a 1/2 Turtle creature token onto the battlefield.
-3: Put a +1/+1 counter on each creature you control, then put a 1/2 Turtle creature token onto the battlefield.
-12: Put X +1/+1 counters on each turtle you control, where X is your life total. Destroy all non turtle creatures with power below X.