Well, non-mythics are not supposed to know about them, there are laws about it, so I would imagine mythics and non-mythics getting together is pretty rare, so them having kids is even more so ...I would guess. So far, we only know of two, ourselves, and that cute girl who works with Nefari.Yes, precisely. Male full-blood mystics are not rare; it's the male half-blood mystics that are rare, unless I'm misremembering. I can't recall anymore exactly why; something about the mythic blood being more powerful or dominant or some such.
Don't remember anything about gender, but it's been a while since I played that part...