Is Pyxis of Pandemonium legal in Standard, Modern, and Commander?

Pyxis of Pandemonium is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Pyxis of Pandemonium?

Pyxis of Pandemonium is an Artifact. Its oracle text reads: "{T}: Each player exiles the top card of their library face down. {7}, {T}, Sacrifice this artifact: Each player turns face up all cards they own exiled with this artifact, then puts all permanent cards among them onto the battlefield."

Pyxis of Pandemonium

Artifact

: Each player exiles the top card of their library face down.

, , Sacrifice this artifact: Each player turns face up all cards they own exiled with this artifact, then puts all permanent cards among them onto the battlefield.