Relentless Rats is a uncommon Creature — Rat card from Tenth Edition (10E), collector number 173. Current market price: $4.48 (foil $6.18), TCGplayer market prices via Scryfall.
This creature gets +1/+1 for each other creature on the battlefield named Relentless Rats. A deck can have any number of cards named Relentless Rats.