Board Thread:General Discussion/@comment-23932365-20150709125738/@comment-4902593-20150710082629

Pharaohs had like, several children, so there is a pretty good chance that they would have numerous descendants. Also, throughout the world, there would be about 2000 magicians from the House of Life.

So yeah, a 90 percent majority of magicians do possess the blood of the Pharaohs. The remaining minority are humans who "stumbled" into magic, like Desjardins' uncle. It happened in the Percy Jackson series too, when Dr Claymore comes across Lamia.

Sometimes, Egyptian gods break out and possess random mortals, like Ptah did to the farmer. So it is possible that the descendants of the host would possess some ability to perform magic.

I guess it depends on several factors, but the main thing is that, you need to host a god for that. No need to be an entirely different species.