Is Museum Nightwatch legal in Standard, Modern, and Commander?

Museum Nightwatch is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Museum Nightwatch?

Museum Nightwatch is a Creature — Centaur Soldier. Its oracle text reads: "When this creature dies, create a 2/2 white and blue Detective creature token. Disguise {1}{W} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) *"You there, halt! The gallery is closed. Wait—what are you doing?"* Power/Toughness: 3/2"