Murkrot

{g}, Exile a creature card from a graveyard: Put a
+1/+1 counter on Murkrot, it gains trample until
end of turn.
{b}, Sacrifice a creature: Put a +1/+1 counter on Murkrot, it gains menace until end of turn.
{b}{g}, Discard a creature card: Put a +1/+1
counter on Murkrot, it gains indestructible until
end of turn.