Is Lightform legal in Standard, Modern, and Commander?

Lightform is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Lightform

Q: What type of card is Lightform?

Lightform is an Enchantment. Its oracle text reads: "When this enchantment enters, it becomes an Aura with enchant creature. Manifest the top card of your library and attach this enchantment to it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.) Enchanted creature has flying and lifelink."

Enchantment

When this enchantment enters, it becomes an Aura with enchant creature. Manifest the top card of your library and attach this enchantment to it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Enchanted creature has flying and lifelink.

Set Commander 2018

Rarity Uncommon

Mana Value 3

Artist Steve Prescott

Collector # 68

Scryfall Gatherer