The Reaver Cleaver is a rare Legendary Artifact — Equipment card from Modern Horizons 3 Commander (M3C), collector number 217. Current market price: $24.48, TCGplayer market prices via Scryfall.
Equipped creature gets +1/+1 and has trample and "Whenever this creature deals combat damage to a player or planeswalker, create that many Treasure tokens." Equip {3}