Hammer of Nazahn is a rare Legendary Artifact — Equipment card from Commander Masters (CMM), collector number 388. Current market price: $14.25 (foil $17.56), TCGplayer market prices via Scryfall.
Whenever Hammer of Nazahn or another Equipment you control enters, you may attach that Equipment to target creature you control. Equipped creature gets +2/+0 and has indestructible. Equip {4}