MC starts off weak but gets an OP item and has a lot of knowledge because he's sent back in time, story is told from the perspective of him going back in time and trying to solve issues he previously encountered while weak but now with OP powers. Good character relationship dynamic, more of a team-based story where the OP MC helps out people he wasn't able to last time, very refreshing in general to have a story that doesn't just focus on the MC's progress, but also how they interact with other people and influence the world around them, other than people just fanboying overthem.

Writing involving the powers with norse gods is kind of cringey, not that much of a problem in the early chapters but I could see it making the plot kinda weird in the future.