Is Sigarda's Imprisonment legal in Standard, Modern, and Commander?

Sigarda's Imprisonment is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Sigarda's Imprisonment?

Sigarda's Imprisonment is an Enchantment — Aura. Its oracle text reads: "Enchant creature Enchanted creature can't attack or block. {4}{W}: Exile enchanted creature. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")"