Becoming the strongest advanturer

It's a story about a young boy named Halburg who wishes to be the strongest advanturer. Being the third son of a noble family, he can't succeed his father. But, it doesn't discourage him, it on the other hand makes reaching his goal easy. With the power of a unknown unique skill [?????] he becomes strong more quickly than others. Now read the story of the boy of how he becomes the strongest and what kind enemies he encounters in order to achieve his goal