Termina Moon, Doombringer

+1: Target creature loses all abilities and becomes a green Deku Scrub with base power and toughness 1/2.
-X: Put a doom counter on Termina Moon, Doombringer. Shuffle the top X cards of your graveyard back onto your library.
-20: Remove all doom counters from Termina Moon, Doombringer. For every 2 doom counters, you may have target player lose the game.