"An everyday man gets thrown into the world of twilight thousands of years before the start of the plot. With immortality and incredible abilities. How will this man's presence change the outcome of the original story?" [ this is a slow-burn fanfiction; the MC is just trying to experience life and enjoy it, not to take over the world and rule from the shadows.] I do not own twilight or the characters of the twilight world, all that belongs to me are my own characters.
You are the author so I read but I have a question is Markus in his first life an alternate version of Markus from your dxd ff and if it is like that is it because of the diffract magi to that he didn't develop the dimand cores?