Icy Blast is a rare Instant card from Khans of Tarkir Promos (PKTK), collector number 42s. Current market price: — (foil $4.89), TCGplayer market prices via Scryfall.
Tap X target creatures. Ferocious — If you control a creature with power 4 or greater, those creatures don't untap during their controllers' next untap steps.