Dwarven Hammer is a uncommon Artifact — Equipment card from Kaldheim (KHM), collector number 133. Current market price: $0.21 (foil $0.31), TCGplayer market prices via Scryfall.
When this Equipment enters, you may pay {2}. If you do, create a 2/1 red Dwarf Berserker creature token, then attach this Equipment to it. Equipped creature gets +3/+0 and has trample. Equip {3}