The Infamous Cruelclaw is a mythic Legendary Creature — Weasel Mercenary card from Bloomburrow (BLB), collector number 334. Current market price: $2.24 (foil $5.25), TCGplayer market prices via Scryfall.
Menace Whenever The Infamous Cruelclaw deals combat damage to a player, exile cards from the top of your library until you exile a nonland card. You may cast that card by discarding a card rather than paying its mana cost.