Is Sworn to the Legion legal in Standard, Modern, and Commander?

Sworn to the Legion is legal in: Historic.

Sworn to the Legion

Q: What type of card is Sworn to the Legion?

Sworn to the Legion is an Enchantment. Its oracle text reads: "When Sworn to the Legion enters the battlefield, nontoken creatures you control perpetually gain double team. (When a creature with double team attacks, conjure a duplicate into your hand, then both of them perpetually lose double team.) Whenever you cast a creature spell, it perpetually gains double team."

Enchantment

When Sworn to the Legion enters the battlefield, nontoken creatures you control perpetually gain double team. (When a creature with double team attacks, conjure a duplicate into your hand, then both of them perpetually lose double team.)

Whenever you cast a creature spell, it perpetually gains double team.

Set Alchemy Horizons: Baldur's Gate

Rarity Mythic Rare

Mana Value 6

Artist Aaron J. Riley

Collector # 30

Scryfall