Li Chen suddenly thought of this question.
Since Gene Evolvers needed to consume a massive amount of Evolution Energy every time they broke through.
That meant they needed to find a large number of energy sources.
Because in reality, the growth of a Gene Evolver's strength was itself the plundering of energy from other people or other objects.
Just like the Second Generation Zombie King and the First Generation Zombie King before.
After exhausting their own potential, their strength had remained at the peak of the seventh tier.
If they wanted to continue evolving, they could only do so by continuously plundering the energy of other zombies.
The same principle applied to human Evolvers.
Human survivors needed to consume Energy Crystal Cores dropped by zombies in order to evolve.
Or they could refine certain raw materials with high energy content into Evolution Fluid.
Then use the Evolution Fluid to achieve Gene Evolution.
That was another form of plundering.
It was an entirely different—one could even say opposite—Power system from developing the "Small Universe" that already existed within the human body!
This gave rise to the doubt Li Chen had just had.
As Gene Evolvers reached increasingly higher levels.
What was the source of their power?
"Noah!"
"There's a question I've wanted to ask you for a long time."
In the end, Li Chen could not hold back any longer.
Because he suddenly realized a very serious problem.
This Doomsday Catastrophe that had occurred on Earth.
Had actually become very clear by now.
It was a game of energy plundering.
Hua Ju Laboratory, or rather, the Prite People.
Had released the Zombie Virus onto this planet.
Allowing it to infect humans and every other life-form on this planet.
Turning those life-forms into usable "materials."
Or, more accurately, into "raw materials" from