Assimilation Technique of Dao and Soul. 

Wu Yu had devoted everything into mastering this dao technique. 

This dao technique wasn't as difficult as the Barren Great Dao Finger and was a special type of dao technique. Moreover, Wu Yu happened to have a full primordial spirit and was better suited for dao technique of this kind than others. 

After suffering several dao technique attacks from the Fox Demon Queen previously, he had built a level of foundation. Now that he was researching into it, he didn't encounter huge difficulties. 

Wu Yu had mastered the core of the dao technique first. As for the other details, he would be fine by completing them subsequently. 

Moreover, with the two times time-acceleration advantage of the Floating Dreams Pagoda, he spent a total of close to two months to fully devote himself into studying it. 

After successfully mastering the Assimilation Technique of Dao and Soul, it hadn't even been one month in the outside world. 

He had now mastered a number of dao techniques. 

However, those with over a hundred cultivation years would have mastered even more. It was just that those were largely diverse and disordered and weren't as focused as what Wu Yu had mastered. Moreover, those wouldn't work as well than Mystiques, offensive spirit...