Ojutai's Breath

Casting the card again due to the delayed triggered ability is optional. If you choose not to cast the card, or if you can’t (perhaps because there are no legal targets available), the card will stay exiled. You won’t get another chance to cast it on a future turn.

If a spell with rebound that you cast from your hand doesn’t resolve for any reason (either because another spell or ability counters it or because all its targets are illegal as it tries to resolve), none of its effects will happen, including rebound. The spell will be put into its owner’s graveyard and you won’t get to cast it again on your next turn.

If you cast a spell with rebound from any zone other than your hand (including your opponent’s hand), rebound will have no effect.

As long as you cast a spell with rebound from your hand, rebound will work regardless of whether you paid its mana cost or an alternative cost you were permitted to pay.

Rebound will have no effect on copies of spells because you don’t cast them from your hand.