Niblis of Frost is a rare Creature — Spirit card from Eldritch Moon (EMN), collector number 72. Current market price: $0.38 (foil $1.09), TCGplayer market prices via Scryfall.
Flying Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast an instant or sorcery spell, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.