Chromatic Rift

Split Second & Convoke

Destroy target permanent, then roll a D20.
1-3= Exile this spell once it resolves.
4-6= Exile the targeted permanent instead.
7-9= Ditto above & shuffle this in your library.
10-12= Ditto above & choose another target.
13-16= Ditto above & Take The Initiative.
17-20= Ditto above & has Demonstrate.