Well
Honestly speaking stories like this in today's times aren't that good to bring such huge plottwists
I don't think it was someone else cuz the whole point and hashtags of the story are mc getting betrayed and reincarnating and getting strong again
Also if u must know he's a child right now
The prince
He is surrounded by such massive racism that he will surround himself by it without thinking it's bad
And ofc grown up prince killed all his brothers to be the king more like made mc kill them all
If he wanted to help mc he wouldn't have waited to become the king
He would have helped mc little by little even during his prince time
If he was such a great magician with such strength he could have done the killing himself
But he used mc like a pawn and discarded him
You should have realised it's not that complicated like you're making it
So you think author made someone impersonate prince with magic when prince himself is such a great magician and showed no left traces of what real prince did after that
That's a dead endgame
Cuz this mc will have no such clue he will hate prince and honestly he should
And honestly I don't think that someone could pretend to be prince via magic
Cuz if it's a magic world then different ppl will have different magic wavelength and at least someone in sucha huge army which killed and burned those people houses would have realised
Even if it was someone disguised as prince
A prince more like a king foolish enough to want to save that village and could not protect them from that purge
Even after getting such a huge help from mc is as good as a bastard
I don't think he deserves mc's friendship
bro Heintz used and threw away MC like disposable trash. He thinks Galda should know their place and never stand up to power. Didn't you read the 1st cp he wants to kill him because he has no magic, and he's too powerful for no reason, although he has no magic. So killing him is the best option. Prince Jack ass just hates the fact that MC is powerful even without magic and can flip the way people think so highly of magic.
The more I read, the more it aligns with my theory than yours, after all. And thus more and more it marks your comments about the prince as less factual than mine, which means the accusation is coming from you, because it's also becoming more and more clear that they're based on rationale that isn't grounded even in the logic of the story.

Was it really Heintz that betrayed him? Because he isn't acting like he wants to use him only because he's a Galda.