Is Aurora Phoenix legal in Standard, Modern, and Commander?

Aurora Phoenix is legal in: Legacy, Vintage, Commander.

Aurora Phoenix

Q: What type of card is Aurora Phoenix?

Aurora Phoenix is a Creature — Phoenix. Its oracle text reads: "Flying Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Whenever you cast a spell with cascade, return this card from your graveyard to your hand."

Creature — Phoenix

Flying

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Whenever you cast a spell with cascade, return this card from your graveyard to your hand.

Set Commander Legends: Battle for Baldur's Gate

Rarity Rare

Mana Value 6

Artist Caio Monteiro

Collector # 778

Scryfall Gatherer