The Marauders: Wizard King/God of Magic

I own only the MC.

MC transmigrates to the Harry Potter world in the time of the Marauders as he knows Voldermort is out there so while finding Dumbledore, he travel with him to other Magic schools as his parents agreed to train as all headmasters and headmistresses sees a prodigy, with the wishes he has he will protect this world from all dark wizards who would do harm.

Bellatrix and her sisters are in this as well in Hogwarts.

MC is OP.