Dr. Strange, Sorcerer Supreme

Flying, Ward-Discard a Sorcery Card

Whenever an opponent casts a spell that targets a permanent you control, copy that spell.
You may choose new targets for that spell.

Exert Dr. Strange, Sorcerer Supreme: Remove
target spell from the stack and exile it.
When Dr. Strange, Sorcerer Supreme next becomes untapped you may cast that spell without paying
its mana cost.