Theros

Pyxis of Pandemonium

{T}: Each player exiles the top card of his or her library face down.
{7}, {T}, Sacrifice Pyxis of Pandemonium: Each player turns face up all cards he or she owns exiled with Pyxis of Pandemonium, then puts all permanent cards among them onto the battlefield.

{T}: Each player exiles the top card of their library face down.
{7}, {T}, Sacrifice Pyxis of Pandemonium: Each player turns face up all cards they own exiled with Pyxis of Pandemonium, then puts all permanent cards among them onto the battlefield.