The Star Zombie intensely focused on sensing changes from the opposite side, constantly on guard for anything that might touch him, so he could immediately react and blast the opponent into smithereens.
This was actually very exhausting. Any species would feel extremely tired when constantly on high alert, and the Star Zombie felt this even more so. It was a mental exhaustion, unrelated to physical strength.
The reaction speed of a normal human is 0.02 milliseconds, but if one spends an entire day focusing on testing their reaction time, it becomes extremely tiring.
Additionally, the Star Zombie's consciousness was projected from afar, and the distance was truly too far, causing some delay, which made it even more tiring.
Furthermore, he had to perceive through his body without being able to directly probe the situation on the other side, which added to his exhaustion.
