Concept:
Keith can’t sleep after Naxela. He pretends it didn’t effect him, but of course it did. He even went back to the blades immediately after, which just made this worse. He starts using a sleeping drug that the other blades use, a small wrist cuff that injects the drug for a certain about of hours when set on a timer. It sends the person into an unconscious, dreamless sleep, and only when the time is up and/or the cuff is removed and the needle retracts does the person wake up. Keith hates it but the side effects are better than getting no sleep at all.
Until one time he is at the castle, and one of the Paladins freaks out after coming to his room because they can’t wake him up.
*sends rays of motivation to OP*