Demon-born

Demon-born are males and females born to either a father or mother who was a demon.  Sometimes male/female demons mate with male/female humans as a form of sadistic pleasure, others do it as a way of infiltrating humanity's bastions of power, a few rare ones do it because they love their human counterparts and want to abandon their demon-hood.   The most significant feature of Demon-born are their eyes.  The are born with yellow eyes like you see with those who embrace the Dark Side of the Force in the Star Wars genre, which is due in fact to their demonic parents.

One other factor with Demon-born is that they are unable to enter places of White Magic (like holy places) The parents who would obviously be Demons would not be able to enter places of White Magic without bursting into flames and turn to ash. The first generation catch on fire, slowly burn and if not removed may die from third degree burns.  The second would suffer from second degree burns, the third would suffer first degree burns, the fourth wouldn't feel anything except their body temperature would be equal to that of having a high fever.  The fifth generation are not regarded as Demon-born in any sense like the previous generations.

The fifth generation would be able to enter any place where their is White Magic without suffering in any way as the previous generations and the odds of them being born with yellow eyes is less than likely.  For this process to happen every generation of Demon-born from the first to fourth generations of Demon would have to mate a human male/female who has never been a first to fourth generation Demon-born.  A fifth generation Demon-born or beyond would also be acceptable provided they are not liars.