Excalibur II is a rare Legendary Artifact — Equipment card from Final Fantasy (FIN), collector number 257. Current market price: $1.18 (foil $1.33), 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}