Lin Huang only slept for less than four hours and woke up when it was around 7 a.m. His exhaustion fighting the remnant of the will was now washed away.
To a person on immortal-level, sleeping two to three hours a day would suffice. In reality, not sleeping for a few days would not pose a problem, except that he might be a little tired.
It would not be an issue if he was fighting someone ordinary. However, the slightest deterioration in performance due to his personal condition would cause defeat. When it came to fighting, proper rest was mandatory because the worst that could happen with a poor condition would be death.
Lin Huang made it a habit to maintain sufficient sleep every day. Having sufficient sleep allowed him to do whatever he wanted to do with all the energy and focus that he had, resulting in higher efficiency compared to if he lacked rest.