Clay was walking with short and unsteady steps looking at the sky but not finding the moon anymore. His mind wavered for a moment, nearly making him fall unconscious, but he supported himself on a three while taking deep breathes.
"For how long will I be able to keep going like this? I am getting really tired... When was the last time I got more than two hours of sleep a day?"
Clay generally wasn't inclined to sleep often. There were nights when he would stay awake just so he wouldn't have the same usual nightmares that got him very depressed and demotivated. Also, when he had those nightmares, his night was always turbulent and uncomfortable, so he couldn't feel energized even after several hours of sleep.
Ascendants don't need more than four hours of sleep to get recover from an exhaustive day, and that's why Clay didn't get any major mental and physical problems due to his lack of sleep.