When the body of the Aquathren started turning purple, Sophia spoke in Alex's head.
[Looks like the demonic energy had absorbed whatever energy it could from the Aquathren's body.]
'I see, but why did his body turn purple?'
[That's because of demonification.]
'Demonification? Isn't he dead already?'
Alex grew confused inwardly, but none of that showed outside as he kept looking at the Aquathrens with a contemplating expression.
[He did die, but the demonic energy you sent inside of him made him an incomplete demon.]
'So, you mean to say that if he were to somehow survive and take then somehow take control of the demonic energy, he would've been a complete demon, by now?'
[Yes, that is what I'm trying to say.]
'I see….' Alex nodded his head and started thinking of ways to make better use of this knowledge, but then Sophia spoke again.
[Oh, you can also extract the demonic energy that you sent inside him.]