Rancid Rats is a common Creature — Zombie Rat card from Shadows over Innistrad (SOI), collector number 130. Current market price: $0.28 (foil $1.33), TCGplayer market prices via Scryfall.
Skulk (This creature can't be blocked by creatures with greater power.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)