For some reason, he was unable to change his main job class. According to the system, the first job class that he learned would be his permanent main class till the end of time. Meaning, he couldn't swap the Shepherd Job Class for any other classes.
Daddy Dragon Master is the upper heaven power up probably
"Well, to put it simply, there will be countless people who will become envious of your talents, and because you have no powerful family backing you, there will be nothing to stop these people from trying to harm you— destroy you before you can grow too powerful," Long Yijun said to him.
And Ning Tian, a small sapling, has also successfully grown into a strong tree. The whole tree gives people a dynamic force of life, and the tree also exudes a great feeling of the spirit, making people inexplicably feel the idea of bowing down.