Is Leyline of Transformation legal in Standard, Modern, and Commander?

Leyline of Transformation is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Leyline of Transformation

Q: What type of card is Leyline of Transformation?

Leyline of Transformation is an Enchantment. Its oracle text reads: "If this card is in your opening hand, you may begin the game with it on the battlefield. As this enchantment enters, choose a creature type. Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield."

Enchantment

If this card is in your opening hand, you may begin the game with it on the battlefield.

As this enchantment enters, choose a creature type.

Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Set Duskmourn: House of Horror

Rarity Rare

Mana Value 4

Artist Sergey Glushakov

Collector # 63

Scryfall Gatherer