Great stuff so far! This could be the beginning of a fantastic series!
I'm slowly working my way through Oathbringer right now. If the setting and characters of this story were changed, I'd be hard-pressed to tell the difference between your writing and his.
I will say right off, however, that I am not great at offering negative feedback so you should take everything I say with a grain of salt. I really enjoyed this, though and I can't deny that.
RE: The Wizards betrayal – A Concept Fantasy Story - Part One