Dreg Mangler is a uncommon Creature — Plant Zombie card from Return to Ravnica (RTR), collector number 158. Current market price: $0.16 (foil $0.39), TCGplayer market prices via Scryfall.
Haste 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.)