Starving Bushstalker

Starving Bushstalker can't block.
Trample
Survival - (Whenever a creature you control dies, put
a +1/+1 counter on this creature.)
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Hatch {g}{b/g} - Sacrifice a creature: Return
Starving Bushstalker from your graveyard to the battlefield with a -1/-1 counter. You may only activate this ability once.