846 A Possible Soul Realm

"Will the souls of sea monsters suffice?" Leon inquired. 

"All types of souls will help me improve, but it also depends on their quality. It will take a lot of sea monster souls to achieve any significant improvement, especially if it's only the souls of Lesser Demon-level sea monsters," Duna answered. 

"How many souls are we looking at, though? Do you have an estimate for Lesser Demon-level sea monster souls?"

"We're probably looking around 10-million souls if they're only Lesser Demon-level sea monsters," Duna casually replied after a brief moment of contemplation.

However, Leon's lips twitched upon hearing such a high number. 

"That's quite a high number of souls…" Leon rubbed his forehead with a wry smile. 

"Fortunately, the Bone Sea has quite a lot of sea monsters… So we can aim for some Greater Demon-level sea monsters and maybe even some weak Arch Demon-level sea monsters…" he added.