Chapter 506: Chapter 302: Arctic Yan-Ou, merits so outstanding as to intimidate the ruler.

Whether it was the Talent Category Limit-Breaking Serum or the Body Limit-Breaking Serum, the duration of both was extremely long.

In the cave, Su Lin endured the scorching airflow's broiling heat for what seemed an unknown length of time.

There was no light in the cave, just pitch blackness.

The temperature that now filled the cave had reached thousands of degrees Celsius, and the resilient flowers, grass, and microorganisms within were all incinerated to ash at these temperatures.

At this moment, Su Lin, who had been persistently holding on, could feel his formidable willpower begin to waiver, beaten back bit by bit under the crushing pain and the sense of powerlessness that comes with near exhaustion.

He was about to give in!

Given that Su Lin's willpower had withstood two episodes of Genetic Metamorphosis and the tempering by numerous doses of Strengthening Serum, one could imagine how intense the pain was since even he was struggling to hold on.