Giant's Amulet is a uncommon Artifact — Equipment card from Kaldheim (KHM), collector number 59. Current market price: $0.33 (foil $0.32), TCGplayer market prices via Scryfall.
When this Equipment enters, you may pay {3}{U}. If you do, create a 4/4 blue Giant Wizard creature token, then attach this Equipment to it. Equipped creature gets +0/+1 and has "This creature has hexproof as long as it's untapped."(It can't be the target of spells or abilities your opponents control.) Equip {2}