Excalibur II is a rare Legendary Artifact — Equipment card from Final Fantasy (FIN), collector number 352. Current market price: $2.27 (foil $2.89), TCGplayer market prices via Scryfall.
Whenever you gain life, put a charge counter on Excalibur II. Equipped creature gets +1/+1 for each charge counter on Excalibur II. Equip {3}