The Reaping

Leonardo sacrifices his life for his brothers when he is forced to go down with the Technodrome to hold back the wrathful Kraang Prime. He accepts his fate when the water rises and he slowly, but surely, begins to run out of air. But long after his vision has darkened and his heart has gone still in his chest, he wakes up physically unscathed as if he had never died. The blue cladded turtle goes on to discover that he has unfathomable abilities with an unknown origin - and that is what he must go on to discover.

"You're underwater...deep, deep underwater. You're drowning. Do you want to come back up?"
"Yes."
"Then take a deep breath and...redux."