Lord Skitter, Sewer King is a rare Legendary Creature — Rat Noble card from Wilds of Eldraine (WOE), collector number 339. Current market price: $6.90 (foil $7.82), 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."