Krosan Cloudscraper is a rare Creature — Beast Mutant card from Legions (LGN), collector number 130. Current market price: $1.04 (foil $15.00), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, sacrifice this creature unless you pay {G}{G}. Morph {7}{G}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)