The Infamous Cruelclaw is a mythic Legendary Creature — Weasel Mercenary card from Bloomburrow Promos (PBLB), collector number 219p. Current market price: $1.55 (foil $1.66), 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.