Bab 581: Ancient Family Practice 

Layla commented when she saw Vicente's reaction. "Consanguineous relationships are not common on the continent, but there are cases like this everywhere. 

In some areas, traditional families have followed this practice for millennia, marrying cousins, uncles and nieces, aunts and nephews, etc.

That is a powerful practice for keeping a family's lineage pure and strengthening certain traits. For some powerful clans, this practice is vital to their existence and perpetuating their powerful magical abilities."

Unlike on Earth, inbreeding in Polaris Realm didn't have the adverse risks of producing offspring with degenerative conditions and so on. On the contrary, this practice was able to merge the best genes from the same family and create extraordinarily pure and powerful bloodlines.