Pebbles, Rotwood Behemoth

Indestructible, trample, flying
Whenever Pebbles, Rotwood Behemoth deals
combat damage to a player, put a petrifying
counter on that player.
Sacrifice a land: Each opponent's creatures
get -1/-1 until end of turn.
When Pebbles reverts back to its original form,
the player will gain 3 life.
If an opponent has five or more petrifying
counters on them, that player loses the game.
Primal Power unleashed! Now rot!