Is Windreaver legal in Standard, Modern, and Commander?

Windreaver is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Windreaver?

Windreaver is a Creature — Elemental. Its oracle text reads: "Flying {W}: This creature gains vigilance until end of turn. {W}: This creature gets +0/+1 until end of turn. {U}: Switch this creature's power and toughness until end of turn. {U}: Return this creature to its owner's hand."