not exactly the best first chapter.. you wanna get peoples attention but you're just setting up another reincarnation story without anything interesting happening
My prediction would be that all mages would target his crown since he's the "weakest," as though defeating him would grant them the title of "emperor" (probably dies by poisoning).
Then he would refuse to climb the power ladder in his second life by staying in a magic school and refusing/throwing all duels and tournaments.
Maybe this time the dude will simply die of old age or some disease that healing magic cannot cure.
E.g. cancer which is not "damage" but a "different kind of" cell compared to normal cells. Hence could not be treated by "healing magic" that restores the body to an "undamaged" state or "purifies" the body of alien components cause the cancer cells would be neither damaged cells nor alien components.