Root Elemental is a rare Creature — Elemental card from Scourge (SCG), collector number 127. Current market price: $0.29 (foil $7.00), TCGplayer market prices via Scryfall.
Morph {5}{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.) When this creature is turned face up, you may put a creature card from your hand onto the battlefield.