Excalibur

The legendary sword used by heroes and kings. It has a great power that is unmatched by any other weapon. It turns out that anyone can use Excalibur. However, no one can put up with its personality (it has a bigger ego than Black Star). The only reason that those who use it are called heroes is that they can put up with its annoying habits, such as a list of one-thousand things he demands to be completed, such as daily five-hour reading sessions. Excalibur was first introduced when Kid and Black Star found a book about him and thus sought him out, only to discover that the book had in fact bee