Agoras, Justiciar Worldwielder

You may cast Agoras, Sage Worldwielder from exile or from outside the game and as though it had flash as long as you exile a multicolored card from you hand in addition to its other costs.
When Agoras enters the battlefield, choose one --
* Each player can't cast spells this turn.
* Shuffle into their owners' libraries each card that was put into that player's graveyard this turn.