Riftburst Hellion is a common Creature — Hellion card from Murders at Karlov Manor (MKM), collector number 228. Current market price: $0.04 (foil $0.14), TCGplayer market prices via Scryfall.
Reach Disguise {4}{R/G}{R/G} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.)