Chapter 3908: Battle Strength of the Emperor

Jian Wushuang had been exploring the dark areas in the Demon Dragon field and challenging the strongest experts in the dark areas. His goal was to perfect his two sword formations as much as possible, over the years, he had gained something, but not much.

The biggest improvement he had made in the two sword formations was in the 9th Dark Zone, under the guidance of Blood Rain Demon Venerable for thirty years.

During those thirty years, his two sword formations could be said to have improved by leaps and bounds.

And now, he had met another expert who was good at formations, and he was publicly acknowledged to be number one in the first level of the Eternal Dark Prison!

This Ruler Spark's understanding of array formations was definitely higher than Blood Rain Demon Monarch's, or even much higher.