Untai, the Unstable Prodigy

Whenever an opponent casts an instant or sorcery, you may discard a card. If you do,
flip a coin. If heads, copy that spell, you
may choose new targets for the copy. If tails, that opponent may copy that spell, and
choose new targets for the copy.
"He knew he had no idea what he was doing,
but it was impressive nonetheless."