Is Fledgling Mawcor legal in Standard, Modern, and Commander?

Fledgling Mawcor is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Fledgling Mawcor?

Fledgling Mawcor is a Creature — Beast. Its oracle text reads: "Flying {T}: This creature deals 1 damage to any target. Morph {U}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) Power/Toughness: 2/2"