Whipcorder is a uncommon Creature — Human Soldier Rebel card from Onslaught (ONS), collector number 60. Current market price: $0.35 (foil $15.44), TCGplayer market prices via Scryfall.
{W}, {T}: Tap target creature. Morph {W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)