The Thirty Years' War: My Shura Field Tears Through the Endless Stars

[Everyone, I like war, but I like girls even more.] I was in Europe during the Thirty Years' War, preparing to conquer the world through sheer intellect. Then I suddenly discovered a host of Old Ones, Old Gods, Outer Gods, and their followers, all of whom had appeared out of nowhere, along with secret societies, extraterrestrial civilizations, alien races, and the like. How am I supposed to deal with all of that? And what in the world are these bloodline bearers and witches who seem capable of reverting to their ancestral forms? Also, what should I call this body of mine, seemingly constructed from an infinite number of question marks, and my perfectly self-consistent true form, which occupies the apex of all sixty-four dimensions? Sigh, never mind. First, I should make the seventeenth-century natives led by Richelieu, as well as the revenants like Louis IX and Joan of Arc, submit to me. Yes, that'll do.______Broadly speaking, the novel's plot will unfold in three stages: 1. A Thirty Years' War-style European stage 2. A Legend of the Galactic Heroes-style stage 3. A Warhammer 40k-style stage