Is Lumithread Field legal in Standard, Modern, and Commander?

Lumithread Field is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Lumithread Field?

Lumithread Field is an Enchantment. Its oracle text reads: "Creatures you control get +0/+1. Morph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) *Having conquered the Bastion of Suns, the Ota took its light for their own.*"