Is Oroku Saki, Shredder Rising legal in Standard, Modern, and Commander?

Oroku Saki, Shredder Rising is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Oroku Saki, Shredder Rising

Q: What type of card is Oroku Saki, Shredder Rising?

Oroku Saki, Shredder Rising is a Legendary Creature — Human Ninja. Its oracle text reads: "Sneak {1}{B} (You may cast this spell for {1}{B} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.) Whenever Oroku Saki deals combat damage to a player, you draw a card and lose 1 life."

Legendary Creature — Human Ninja

Sneak (You may cast this spell for if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.)