Rufaga!
Hao Xuan could feel his many wounds healing and the spiritual energy recovering but, even with both swine demons combined the demonic energy was not anywhere close to what he got from the soul-shifting demon.
And a moment later when the swine demon was absorbed down to the last molecule it became apparent why.
"No ruby again," he mumbled staring at the empty ground.
"I think I understand why though. Both of these felt different. It felt like I was sipping on warm water this time rather than the spicy beverage that was the soul-shifting demon. These ones were inherently foreign, almost like a completely different species."
"It has to be either a specific type of demon that drops the rubies or a demon of a certain level...maybe above a certain age? These ones were not only weak but the degree of demonic energies within their bodies was also exponentially lower."