I don’t remember much, besides the character being a male and growing up in a poor village of sorts. And he has a golden eye but it is covered with an eyepatch that is sort of like a bug. It grows legs and pops off when he needs the power.
In the first couple of chapters his village elders and his mentor (well, mostly his mentor) set up a plot to get him to unleash his powers. So he ends up making it seem like he kidnapped the elders and the main character goes down in to a basement of sorts to fight with him, and he eventually unleashes his power and the bug/patch grows off and goes to hide.