Arahbo, the First Fang is a rare Legendary Creature — Cat Avatar card from Foundations Promos (PFDN), collector number 2s. Current market price: — (foil $1.98), 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.