Root Elemental is a rare Creature — Elemental card from Murders at Karlov Manor Commander (MKC), collector number 182. Current market price: $0.25, 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.