Rhox is a rare Creature — Rhino Beast card from Nemesis (NEM), collector number 112. Current market price: $0.46 (foil $5.65), TCGplayer market prices via Scryfall.
You may have this creature assign its combat damage as though it weren't blocked. {2}{G}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)