Ruthless Ripper is a uncommon Creature — Human Assassin card from Khans of Tarkir (KTK), collector number 88. Current market price: $0.10 (foil $0.75), TCGplayer market prices via Scryfall.
Deathtouch Morph—Reveal a black card in your hand. (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, target player loses 2 life.