Overall i think its a good idea for a typical OP mc type fanfictions, the fact that its a HxH just makes its much better. One of the main issues i find is simply the lack of plot at this point, with having an mc this strong, its going to really difficult to write a good fight scene or any type of proper developement. Such as in the original HxH, we start learning about Gon's strength, speed, instinct, and personality through the exam and events occuring to reach the exam. Since this fanfic skipped all those, this mc simply feels like its answering questions like "what would happen if the sharingan is in HxH" or "what is someone can use a reality marble" rather then a story about a new character who has those power. Simply put, the mc doesnt matter in this story, he could be replaced by any other character you can find in any anime such as itachi and etc. In the end though, i do wish this fanfiction will continue since if polished, it can become an interesting novel with a world many dont try to write about (HxH). I honestly hope that in a momth or 2 i can come back and leave a much higher review, so good luck.