Honkai Impact 3rd AU: The Runic Anomaly

Generic Author Review Here: I'm a noob to actually writing a story, but this story is something I decided to write after only finding the poison known as CN MTL and only HI : Invictus being the only EN based HI3 fan-fic I can find on this site. The point of this story is to have an MC who is experienced in the ways of the world generally while marvelling at the contrast between his old one and the world of Honkai. Its also a more strong to strong/ strong to OP and towards the end just giga broken but he will have some struggles as is inevitable when encountering 5th Dimensional Entities like the Imaginary Tree and Sea of Quanta. Yes he uses Runes and has a variety of other more powerful abilities, if you have any Ideas for some Runes he could use and their function let me know and I can maybe find a way to implement them into his skillset in future. He's OP but not to the level he will just floor everyone easily as right now going by VS Battle terms he's around Tier 6C at his max power in the beginning of vol 1 but if we take away the issue of energy and needing to understand reality he would easily be Tier 3 or higher but that will happen later.