The Sharingan was hot-swappable. That was common knowledge.
After emerging from the Kamui Dimension, Uchiha Chen raced back to his laboratory in a blur of sparks and lightning. He activated the protective barrier and, with practiced ease, began the eye-transplant surgery.
Once he had replaced his Three-Tomoe Sharingan, Uchiha Chen let out a muffled groan and collapsed to the floor, his whole body convulsing.
Yin Release Chakra flowed along his chakra network and into the Sharingan, beginning to evolve Uchiha Chen's Three-Tomoe Sharingan.
During the process, Uchiha Chen's emotions instantly returned to that moment of overwhelming bliss. It felt as if his brain had undergone the Big Bang.
Countless dawn-like points of light formed an endless cosmic storm in his mind, sweeping through his entire brain. The storm swirled within his skull, turning his consciousness blank in the midst of this ultimate pleasure before completely swallowing and dissolving it.
His brain instantly released a massive amount of dopamine, while his adrenal glands sharply increased their secretion of adrenaline.
Good food can raise the body's dopamine levels by around 30 percent. A perfect bare-knuckle battle between a man and a woman can increase dopamine secretion by 100 to 200 percent, while certain illegal drugs can raise it by 500 to 800 percent.
What Uchiha Chen had reached now was true "earthly bliss," dozens of times beyond the threshold of an ordinary person.
The massive release of adrenaline drove Uchiha Chen's heart rate to an extreme six or seven beats per second, spurring his blood circulation and cellular metabolism to surge. Every cell in his body was thoroughly energized.
Uchiha Chen had lost all consciousness and sensation. His body convulsed involuntarily on the floor, his skin flushed red and drenched in sweat.
Who knew how much time passed?
"Water!"
Uchiha Chen, limp