At this time, the Dark North Royal Obelisk had already morphed into a tenebrous mystical dragon. The huge, ebony swords which had clashed before had now reformed into a tenebrous mystical dragon of cast iron! This was within the endless depths of gloomy seawater.

It was like flesh packed onto a frame of cast iron, which made the tenebrous mystical dragon even more robust, and at the same time imposing. In a flash, all the seawater gathered on the mystical dragon made of black swords!

This black mystical dragon huffed casually, unleashing a frigid blast that froze the sky, the earth, and one's spirit!

To the Heaven Devouring Avatar, this opponent was too strong. Wu Yu had thought that he stood a good chance, but the appearance of this black mystical dragon and the pressure it exerted made him realize that it was going to be an intense fight. It would not be a walk in the park to master the Dark North Royal Obelisk.

The Heaven Devouring Avatar and the black mystical dragon were fighting in this space.

"What on earth are you? Why are...