The Martial Unity

An eternity of agony passed on. Rui had no idea how much time had passed since the commencement of the evolution procedure. His internal clock had completely been shot thanks to all the pain, and even metabolic phenomena were no longer reliable because of how much his body was rapidly changing. Due to that, things like hunger and thirst were no longer reliable indicators of how much time had passed since he had consumed any food.

The procedure didn't have a defined time limit. This was because everybody had different physiologies and metabolisms that caused the procedure to require different amounts of time to complete successfully.

The psychological effect this had on him along with the pain was not light. It placed an immense burden on his psyche. It wasn't easy maintaining absolute mental fortitude in the face of an unknown amount of agony. This was despite his superhuman mental fortitude by virtue of his mind growing twice and him being a Martial Apprentice. He felt as though if he was an ordinary person he would have lost his mind by now, or at the very least be afflicted with severe PTSD

He gritted his teeth as the pain shifted to different parts of his body within him over long periods of time. He could even vaguely sense which parts of his body were undergoing the evolution process. After the evolution process was done with his bones, they moved on toward his abdomen.

('My digestive system?') He wondered, through the pain.

He knew that the process acted system by system. If the pain was inside his abdomen, then there were a limited number of options it could be. By narrowing down all the possibilities, by eliminating possible systems that didn't match up with the place he was experiencing pain in, he could more or less figure out which parts of his body were undergoing the evolution process at any given time.

He gasped as his throat felt like it was burning. He felt like he had gotten the worst sinus infection that could possibly afflict a human body. Every second, he was in absolute agony, struggling to breathe as he felt like he drunk a glass full of concentrated acid.

Thankfully, his lungs and trachea were perfectly functional, otherwise, he would be completely unable to breathe at all.

Time passed on and on, as he gritted his teeth, keeping track of the pain as it shifted after long periods of evolution.

system to the circulatory system. His very veins and arteries underwent slow and delicate evolution. The process had to be deliberately slow, otherwise, the system would take too much damage and he would die. Blood supplied oxygen and the necessary nutrients to every cell, without which

This made it easier to lower the risk of death

agony he experienced wasn't less. If anything, it was even worse. The fact that it was hyper-focused merely

rather have a little less intense agony spread across his body than

passed and the pain shifted from his circulatory system to the left side of his

melting. He didn't even need to employ any amount of deductive reasoning to know exactly what part of his body was undergoing

His heart.

more accurately, his

filtration processes for the circulatory system were the same as the ones for the cardiovascular system. After all, the two systems were so intricately connected. He had no idea whether the two were even considered to

a long period. The renal system, the endocrine system, the lymphatic system, and the exocrine

they all evolved one after the

only one organ

The brain.

Rui's case,