Rusko, Clockmaker is a uncommon Legendary Creature — Human Artificer card from Mystery Booster 2 (MB2), collector number 263. Current market price: — (foil $69.10), TCGplayer market prices via Scryfall.
When Rusko, Clockmaker enters the battlefield, conjure a card named Midnight Clock onto the battlefield. Whenever you cast a noncreature spell, put an hour counter on each permanent you control named Midnight Clock. Each opponent loses 1 life and you gain 1 life.