UW Sundial Exile deck (Modern)

Basically, the point of this deck is to abuse the fact that for many temporary exile triggers, there are ways to remove the return to battlefield portion of the effect.

For instance, you play Detention Sphere or O-Ring, targeting whatever you want gone. Then, in response to the exile trigger, you flicker or bounce the Sphere, triggering the return from exile clause. The cards are returned from the exile they were not in, then the sphere comes back and chooses new targets to exile. Then the old exile trigger resolves, exiling your initial targets. Since the old return trigger is gone, those cards are gone. FOREVER!

Similarly, you can abuse Sundial by exiling "next end step" triggers off the stack when they appear. Simply respond to the return clauses of Turn to Mist, Flickerwisp, etc. with the sundial active, and then watch as all effects are exiled off of the stack, never to be seen again!

And of course, evoking your mulldrifter in postcombat main and ending your turn in response to the sacrifice trigger works as well.

Don't forget to use your cloudshifts and bounce spells to recycle the creature's effects, and sub in counterspells when necessary. Any of the instants can be put on a stick, and almost all creatures are flying, so the rest is pretty obvious.