Lord Skitter, Sewer King is a rare Legendary Creature — Rat Noble card from Wilds of Eldraine Promos (PWOE), collector number 97p. Current market price: $5.67 (foil $5.13), TCGplayer market prices via Scryfall.
Whenever another Rat you control enters, exile up to one target card from an opponent's graveyard. At the beginning of combat on your turn, create a 1/1 black Rat creature token with "This token can't block."