Taking advantage of the fact that the Diabolical Dragon King and the three 7-heavens demon kings were currently in the Fiendish Underworld Metropolis, Wu Yu started destroying the surrounding Ancient Demon Dragon Perpetual Devourer immortal design frantically the moment he infiltrated into Underworld Dragon's Den. As long as Diabolical Dragon King had not caught up, he would want to destroy as much of the immortal design as possible.

The Ancient Demon Dragon Perpetual Devourer immortal design was not completed to begin with. In fact, only a small portion was. Now that Wu Yu was wrecking it, the progress of the set up would fall back once again.

If the destruction was allowed to continue, there's a good chance that the few years of preparations would have been wiped out.

Therefore, when Diabolical Dragon King sensed that the Ancient Demon Dragon Perpetual Devourer immortal design was being destroyed, anger boiled deep in his body. He bolted back to the Underworld Dragon's Den to pursue and kill Wu Yu.

Diabolical Dragon King was a 8-heavens demon king with prodigious strength. Even though Wu Yu had several incredible Mystiques of the Bloodsucking Scourge, he was almost caught on several...