Ruthless Ripper is a common Creature — Human Assassin card from Masters 25 (A25), collector number 107. Current market price: $0.22 (foil $0.31), 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.