The Star Mecha King was able to see the changes on Ruler Xing Yun's body clearly. Thus, the ruler felt it more clearly.
However, he didn't dare to relax. He continued resisting the Dark Force that had reached the deepest part of his body.
The Dark Force was closing in on his Heart of Evolution. It had already spread to the veins of the Heart of Evolution.
Once he relaxed his mind, the Dark Force would surge into the Heart of Evolution. At that time, the probability of him getting contaminated would increase tremendously.
Even if he could resist the dark contamination on the Heart of Evolution temporarily, it would be hard to get rid of the Dark Force after it entered the Heart of Evolution.
This was even more difficult than getting rid of a normal living creature's soul after it was contaminated with Dark Force.
This was because the Heart of Evolution of the Mecha Race was extremely complicated and occult. It was closely linked to the Mecha Race's body and their soul.
