Is Ruthless Ripper legal in Standard, Modern, and Commander?

Ruthless Ripper is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Ruthless Ripper

Q: What type of card is Ruthless Ripper?

Ruthless Ripper is a Creature — Human Assassin. Its oracle text reads: "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."