Is Mistmeadow Witch legal in Standard, Modern, and Commander?

Mistmeadow Witch is legal in: Modern, Legacy, Vintage, Commander.

Mistmeadow Witch

Q: What type of card is Mistmeadow Witch?

Mistmeadow Witch is a Creature — Kithkin Wizard. Its oracle text reads: "{2}{W}{U}: Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step. *Olka collected the evening mist for years, studying its secrets. Once she learned its essence, she could vanish with a thought.* Power/Toughness: 1/1"