When an abused blind orphaned boy discovers his magical powers, he struggles to stop a megalomeniac businessman with intent to obliterate his kingdom and his people.

I am not really a fan of the word ‘struggles’ in a logline
—-
“A blind orphan must use his newfound magic powers to stop a megalomaniac from obliterating his kingdom.”
—-
By the way, is there a reason why a businessman would want to obliterate a kingdom? A businessman by nature would need people to buy his products. If everyone is dead there is no one to do business with.

In other words, a businessman would want a healthy kingdom not a destroyed kingdom.

That doesn’t mean you villain wouldn’t act that way, but a couple of words in the logline explaining why destroying the kingdom would be in the businessman’s best self-interest would help the logline.

Anyway sounds like an interesting concept, good luck with this.