He couldn't do it. His life level wasn't high enough, so he was unable to withstand absorbing a massive amount of Origin Genes from other races.
Besides, one couldn't directly elevate their life level just by plundering Origin Genes. It was a gradual process. All aspects of oneself—physical fitness, mental strength, and even gene level—had to keep pace.
The Origin Gene was only one component of a god-level intelligent being's genetic makeup. It might have been the most important component, but it wasn't the entirety of it.
No matter how perfect the Origin Gene was, if other parts of the genome were holding it back, it would still be impossible to evolve to a higher life level.
In subsequent evolutions, the Origin Gene played a role similar to the extracts from before, acting as a "ladder" to higher life levels.
It was just like when Su Ze was at the Saint level: once the ladder was in place, his other skills had to level up and not fall behind before he could climb it.
