Is Culvert Ambusher legal in Standard, Modern, and Commander?

Culvert Ambusher is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Culvert Ambusher

Q: What type of card is Culvert Ambusher?

Culvert Ambusher is a Creature — Wurm Horror. Its oracle text reads: "When this creature enters or is turned face up, target creature blocks this turn if able. Disguise {4}{G} (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.)"