Voracious Vermin is a common Creature — Rat card from Wilds of Eldraine (WOE), collector number 116. Current market price: $0.34 (foil $0.38), TCGplayer market prices via Scryfall.
When this creature enters, create a 1/1 black Rat creature token with "This token can't block." Whenever another creature you control dies, put a +1/+1 counter on this creature.