Fellmount Chieftain

Fellmount Chieftain can't block.
Ferocity 2 (If an opponent was dealt damage this
turn, this creature enters the battlefield with two
+1/+1 counters on it.)
Fester - When Fellmount Chieftain enters the
battlefield, if there is a creature card in each
graveyard, destroy target nonland permanent
with converted mana cost 3 or less.