Huge dose of xenophobia. Not the best writing, with stuff like: "His movements were so fast that most people couldn't even see clearly. They only saw a few wisps of sword light floating in the air." Like what do you mean not see clearly and whats this sword light you are talking about ? At least wait with descriptions like that after MC gets some superhuman abilities. Not to mention the most boring face slapping plots.
System too op. While conditions to travel between worlds are ok, the function to copy abilities is too easy.