Hylderblade is a uncommon Artifact — Equipment card from Edge of Eternities (EOE), collector number 106. Current market price: $0.20 (foil $0.25), TCGplayer market prices via Scryfall.
Equipped creature gets +3/+1. Void — At the beginning of your end step, if a nonland permanent left the battlefield this turn or a spell was warped this turn, attach this Equipment to target creature you control. Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)