Zym, Father of the Nebulae

Whenever you cast a noncreature, nonartifact
spell, you may pay {1}{u}. If you do, exile that
spell, then copy it. You may choose new targets
for the copy.
At the beginning of your end step, exile the top
three cards of your library. If you exile a noncreature, nonartifact spell this way, put it
into your hand at the beginning of your next
upkeep.