The Riot King's Foul Gambit

Exile one card at random from each opponent's
hand. Repeat this process for their graveyards and libraries. You may play any number of cards
exiled this way without paying their mana costs.
The fires rekindle in deep ancient caves
Far beneath where the lunatics rave
Flagons slosh with a dark flaming brew
The Mask resurges, forged anew.
-Prophecy of Crimson Flame