The Great Gubal Library has a book on Lady Amandine which is chonrologicly wrong?

[WyrahFhurrst]

But what you fight that comes out of his body is a named voidsent with the succubus model.

Well then it's a Succubus-appearing voidsent, but not actually a Succubus. We know that Succubi possess dead female bodies, not living male ones.