Gobhobbler Rats is a common Creature — Rat card from Dissension (DIS), collector number 111. Current market price: $0.12 (foil $0.40), TCGplayer market prices via Scryfall.
Hellbent — As long as you have no cards in hand, this creature gets +1/+0 and has "{B}: Regenerate this creature." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)