Search for Threats

Look at your opponent's hand and exile one spell face up. At the beginning of your next turn, return that spell to your opponent's hand.
"I'll hold the door lass, and when it comes through,
you blast it with a fireball."
"Can't."
"Strike it dead with lightning!"
"I'm a conjurer, not a killer!"
"Temporarily banish it?"
"I might be able to."