Pack Rat is a rare Creature — Rat card from Ravnica Remastered (RVR), collector number 426. Current market price: $3.90 (foil $4.50), TCGplayer market prices via Scryfall.
Pack Rat's power and toughness are each equal to the number of Rats you control. {2}{B}, Discard a card: Create a token that's a copy of this creature.