Undercity Behemoth

Undercity Behemoth's power and toughness are each equal to the number of +1/+1 counters on other creatures you control.
Scavenge {3}{b}{g} ({3}{b}{g}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)