After the battle ended, Heath immediately interrogated the fatty. Unfortunately, the fatty's soul seemed to have already been moved, and his mental state wasn't too clear. Heath interrogated for a long time, but he still couldn't come up with a reason.
In the end, he bluntly extracted the fatty's soul and stuffed it into a bottle. Later, he would hand it over to the fortress and let the fortress decide.
As for the rest of the fatty's body, of course...
'Extract.'
[Beep, extraction successful. Spiritual Power +0.3]
[Beep, extraction successful. Spiritual Force +16]
[Beep, extraction successful. Soul Mutation +1,286]
[Beep, extraction successful. Obtained [Soul Fragment].]
[Beep, extraction successful...]
...
The great tonic of the Wizard level was indeed different. There were more than ten items extracted, including attributes, spiritual force, soul fragments, spells, and so on.