Is Feast of the Unicorn legal in Standard, Modern, and Commander?

Feast of the Unicorn is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Feast of the Unicorn?

Feast of the Unicorn is an Enchantment — Aura. Its oracle text reads: "Enchant creatureEnchanted creature gets +4/+0."

Enchantment — Aura

Enchant creature<br>Enchanted creature gets +4/+0.

Set Homelands

Rarity Common

Artist Dennis Detwiller

Enchantment Commander Pauper Legacy