Vihaan, Goldwaker is a mythic Legendary Creature — Dwarf Warlock card from Outlaws of Thunder Junction Commander (OTC), collector number 44. Current market price: $4.07 (foil $8.10), TCGplayer market prices via Scryfall.
Other outlaws you control have vigilance and haste. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.) At the beginning of combat on your turn, you may have Treasures you control become 3/3 Construct Assassin artifact creatures in addition to their other types until end of turn.