Is Ace Flockbringer legal in Standard, Modern, and Commander?

Ace Flockbringer is legal in: Historic.

Ace Flockbringer

Q: What type of card is Ace Flockbringer?

Ace Flockbringer is a Creature — Bird Scout. Its oracle text reads: "Flying Whenever you cast a creature spell without flying, conjure a duplicate of it into your hand. The duplicate perpetually gains flying. This ability triggers only once each turn. Power/Toughness: 3/3"

Creature — Bird Scout

Flying

Whenever you cast a creature spell without flying, conjure a duplicate of it into your hand. The duplicate perpetually gains flying. This ability triggers only once each turn.

Power/Toughness: 3/3

Set Alchemy: Bloomburrow

Rarity Rare

Mana Value 3

Artist Henry Peters

Collector # 20

Scryfall