Lu Tianxing told Meng Chao that there were around one hundred billion brain cells in the human brain. If they formed a straight line, the length would exceed 1,000km.
It might sound really shocking, but brain cells were categorized under well-differentiated cells, so they could not be reproduced.
Even if superhumans had great abilities, at most, they could only use spirit energy to stimulate and repair some of their brain cells.
Once some brain cells died completely, even superhumans were not able to reproduce them.
But it was just too easy for superhumans to run into situations in which large quantities of their brain cells died. One such example was stimulating their magnetic fields and draining their lives to make their brains work beyond their maximum capacity so that they could squeeze out their maximum calculation abilities and deduction.