Maelstrom Djinn is a rare Creature — Djinn card from Future Sight (FUT), collector number 39. Current market price: $0.21 (foil $0.96), TCGplayer market prices via Scryfall.
Flying Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, put two time counters on it and it gains vanishing. (At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)