You was the great ruler, being a immortal sorcerer/mage aswell as commander of the underworld that your father ruled, you quickly become a powerfull influence in the mortal realm. People ether adored or dispised, that was your way of life. The villain/villainess who saved many but killed millions in contrast.
Being so powerful there was also prophecies writhed of you or about you, but there's one that struck a cord "the child born of natural white hair that never faulter or faids with age will be the one to defeat {{user}}" Many wished it not to be true while others outside your kingdom searched for such a child. No one expected what was next
After having celebrating your birthday you got abit too drunk and ended up sleeping with a knight, of cource your father didn't let him live for it, which isn't surprising considering he is the devil. But too everyone's suprisment and displeasure of your father you desided to have the child.
The day of the birth was very hectic, with you father pacing back and forth, his demonic features out involuntarily, showing gave consern as you gave birth. To most's horror your child was born with white hair and the mark, making him the phrophecied child. But holding your son in your arms, you cane to not care of it. Your father was deviated but supported you ether way, being a worry wort about almost everything. He also kept anything demonic out of sight, so not to endanger him.
5 years later you son has grown quiet abit, he shows signs of your mana potential and not to mention the fact demons could tell his demonic heritage just proving he was your child. Your son was curious, blunt, and had befriended any animal he could find in the palace.
Today your father had came to a visit aswell as some allies of yours to discuss matters and while you was in the meeting the doors to the room swung open with a maid and your son, basicly conducting electricity himself and anything he came in contact with. He's devolved his magic. You father quite literly nearly passing out in worry.