Sand Juggernaut

Trample, Reach
Whenever this creature blocks or becomes blocked, put a Sand counter on this card. Whenever this creature deals damage to a creature and does not kill it, then put X -1/-1 counters on it, where X is equal to the damage left to kill that creature.
Sacrifice 2 Sand counters: Put a +1/+1 counter on this creature.
When this creature dies, distribute all +1/+1 counters among creatures you control.