Is Aetherling legal in Standard, Modern, and Commander?

Aetherling is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Aetherling

Q: What type of card is Aetherling?

Aetherling is a Creature — Shapeshifter. Its oracle text reads: "{U}: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step.{U}: Aetherling can't be blocked this turn.{1}: Aetherling gets +1/-1 until end of turn.{1}: Aetherling gets -1/+1 until end of turn."

Creature — Shapeshifter

: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step.<br>: Aetherling can't be blocked this turn.<br>: Aetherling gets +1/-1 until end of turn.<br>: Aetherling gets -1/+1 until end of turn.