I'm Learning to Cultivate Immortality in the World of Dragon Training

In the world of dragon training, everyone relies on the power of the dragon clan to strengthen themselves. Su Yuan, however, is unique. He opens a mysterious library at the beginning and obtains top cultivation techniques. From then on, others tamed dragons while he cultivated immortality, others rode dragons and he wielded swords... On overseas battlefields, everyone knows that when dealing with a dragon tamer, if you are not hostile to the opponent's contracted dragon, as long as you find an opportunity to attack the dragon tamer yourself, you will have a chance to turn the tide of the battle and turn defeat into victory. And all the people and dragons who had fought with Su Yuan wanted to find the person who spread the news, catch him and give him a good struggle...