Even though the title is 'the incubus system' I would like if somehow the could also wield light energy. After all he is a nephilim. He should have this advantage , besides it would also allow us insight into the angels world maybe.
The story doesn't match with the synopsis . The template is taken from "Rebirth of the red dragon, disciple makes me stronger".
But this remake version is better.
Reincarnated as a Red Dragon, Discipline Makes Me Stronger!