Dular, the Summoner

Flash
This spell cannot be countered.
As an additional cost, you may pay {x}. If you do, exile X target spells, then choose new targets for the exiled spells.
Flying
If Dular, the Summoner would be put into the graveyard or exile from anywhere, shuffle Dular, the Summoner and all cards in your graveyard and exile into their owner's library.