Arahbo, the First Fang is a rare Legendary Creature — Cat Avatar card from Foundations (FDN), collector number 442. Current market price: $1.73 (foil $2.47), TCGplayer market prices via Scryfall.
Other Cats you control get +1/+1. Whenever Arahbo or another nontoken Cat you control enters, create a 1/1 white Cat creature token.