IN short, he was Dusk's father. – That was the first thing that came to Luo Yan's mind once he heard the archdemon's confession. Now, this was totally unexpected. It's like a curve ball that hit him out of nowhere.
If the other was really Dusk's father, then, it would explain most of the things that he had said. Especially the part about not killing Dusk because it would make Alina sad. But as some points were answered, a lot of new questions arose.
Like how did a fragment of his soul attached itself on the body of this dark mage? Was the dark mage there when he died and as a last resort to stay alive, he broke his soul and let that fragment enter the body of the nearest available person? And if he had already attached that soul fragment during the war, then, what had he been doing in the next thousand years?
As if reading his mind, the archdemon – Beelzebub – continued with his tale.
Mini-theather:
Beel: blah... blah... blah... blah...
YanYan whispered to JiYun: Brother JiYun, he's been talking non-stop since earlier. Do you think his throat is okay?
JiYun looked at the archdemon before whispering back to YanYan: Well, he does look a bit parched.
YanYan: Should we give him water?
JiYun: Maybe later after he finished talking.
YanYan: When do you think that would be?
JiYun: ...
(⌒_⌒;)