God Prison

Niu Thirteen's heart skipped a beat. He wanted to try and see if he could absorb the mysterious energy inside to cultivate.    

Without the slightest hesitation, he held the purple stone in his right hand and started to madly circulate the unparalleled Devil Arts within his body.    

Following that, a strong suction force instantly came from his hand and appeared on the purple rock.    

"Boom …"    

The moment this suction force appeared, the purple rock trembled crazily. Then, a mysterious force was sucked into Niu Thirteen's body.    

The moment this mysterious power entered his body, he felt as if he had swallowed an elephant; it was extremely uncomfortable.    

He felt as if he was on the verge of being crushed to death by this mysterious force. Even breathing became difficult. It was as if a massive object had suddenly been stuffed into his body, causing him to wish that he was dead.    

He immediately stopped the suction force in his hand and stopped absorbing the energy from the purple stone.    

After he stopped sucking, the purple stone regained its calmness and stopped channeling mysterious powers into his body.    

However, the mysterious energy that he had just absorbed was still within his body, making him feel extremely uncomfortable.    

Shi Yan didn't know what to do. He had no choice but to control the demon aura inside his body to suppress this mysterious power.    

However, as soon as the devilish qi in his body touched the mysterious power, it moved far away like a mouse seeing a cat.    

In fact, many of his devilish qi were being devoured by this mysterious power, and his devilish qi was being devoured crazily.    

After devouring the demon qi inside his body, this mysterious power had unexpectedly grown stronger, making him feel even more uncomfortable.    

He was shocked in his heart. If he let this mysterious power continue to devour the demonic energy in his body, it would definitely grow to a terrifying level.    

At that time, he might explode and be turned into ashes by this mysterious force. He could not allow this to happen. He had to stop this mysterious force from growing stronger, at least to force it out of his body!    

"What's going on!?"    

Niu Thirteen looked on in horror, not knowing what to do. He had tried many different methods, but none of them were able to stop this mysterious force from growing stronger. This left him completely at a loss as to what to do.    

In the end, he could only madly circulate the unparalleled Demonic Art. The unparalleled Demonic Art circulated manically day after day.    

Gradually, he could feel the mysterious energy gradually following the trajectory of the Unparalleled Devil Arts. Gradually, the pain within his body lessened.    

Slowly, he felt as if he had absorbed a sliver of this mysterious power. He was extremely happy and finally understood the solution to this mysterious power.    

He used all of his strength and crazily circulated the unparalleled devil arts to absorb this mysterious energy. He slowly refined it, and in the end, it actually turned into demonic energy.    

"Boom …"    

Just by refining this sliver of mysterious power, he could feel that his cultivation had improved by a small step, which made him extremely shocked.    

At the same time, he also saw the hope of breaking through. Perhaps after absorbing this mysterious energy, he would be able to break through this bottleneck.    

"It's actually this strong!"    

Sensing that his cultivation base was advancing at a rapid pace, he was pleasantly surprised. He exerted even more effort to circulate the unparalleled devil arts within his body.    

Perhaps it was because he had refined a sliver of the mysterious power, but the refining and absorbing went much more smoothly.