Tinybones, the Pickpocket is a mythic Legendary Creature — Skeleton Rogue card from Outlaws of Thunder Junction (OTJ), collector number 290. Current market price: $11.44 (foil $12.54), TCGplayer market prices via Scryfall.
Deathtouch Whenever Tinybones deals combat damage to a player, you may cast target nonland permanent card from that player's graveyard, and mana of any type can be spent to cast that spell.