He was actually having regret that he wouldn't be able to enslaved the beautiful female butterflywoman, even though his soul is much more powerful than before, it still isn't that exaggerated to the point that he could force his spiritual sense to powerful and intelligent Xiantian Emperor expert.
He could only bide his time and continue to refine his soul, especially now that he had the two fish to help him in this endeavor, most if not everyone would suffer horrendous pain in refining one soul, not to mention it is also extremely dangerous to do so.
Now that he had an ability to do so without any pain and difficulty, of course he was extremely happy.
He smiles cheerfully as he thought of something, he realized that the people he kills would have their soul devoured by the two fish strengthening them in the process.