It came sooner than he had expected. Yet, the transition took its time.
The pain disappeared.
Rui gasped in relief. He had almost forgotten what it was like to not feel pain. Pain had been his only reality for extensive periods of time, more time than he knew. He clenched his fist as raw power coursed through his muscles. He felt invincible.
Yet, he grimaced.
('My brain... My mind... This body is too much for them as they are right now.') He winced as flashes of pain coursed through his head.
This pain was not from the evolution procedure, it was pain from his brain straining.
The human brain had limits to the amount of information it could receive an influx of from the senses. Normally, the human body did not exceed the limit, thus the brain was never strained. However, due to the evolved nervous system and the evolved sensory organs, the influx of information that his brain was receiving had risen tremendously, beyond its ordinary limits.