Dazzling Rebuke

Synergize {4}{u}{r} (You may cast this spell for its synergize cost. If you do, exile this spell as it resolves,
then, you may cast another spell you own in exile with Synergize without paying its mana cost.)
Change the targets of target instant or sorcery
spell an opponent controls then copy that spell,
you may choose new targets for the copy.
With dazzling lights and a touch of frost magic, our
power surges!" - Alyra, Frostguard Queen