HP - Reborn as Merlin's incarnation

This is a story of A young boy who was summond by Marlin in the Harry Potter world. Marlin was trapped in a void of Emptiness and his soul was broken and he cannot get out from here alon. because in this void Marlin would be tortured and can't die either.

so he decides to marge with another soul and Rebon into world.

in the process of merging soul marlin sacrificed himself and give the boy a new chance to live with lots of gift and imaginable power.

that's how MC goes into Harry Potter world and study in Hogwarts