Is Malleable Impostor legal in Standard, Modern, and Commander?

Malleable Impostor is legal in: Legacy, Vintage, Commander.

Malleable Impostor

Q: What type of card is Malleable Impostor?

Malleable Impostor is a Creature — Faerie Shapeshifter. Its oracle text reads: "Flash Flying You may have this creature enter as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying."

Creature — Faerie Shapeshifter

Flash

Flying

You may have this creature enter as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying.

Set Wilds of Eldraine Commander

Rarity Rare

Mana Value 4

Artist Alessandra Pisano

Collector # 10

Scryfall Gatherer