The strongest dragon in the era of beast control

The Earth Dragon God who created the earth, the World Tree that breeds life, the Thunder Wind Leopard that shuttles through lightning, the Ragdoll cat with ever-changing attributes, the mechanical armor at the pinnacle of technology, and the supreme creation beast. This is a world with a brilliant beast-controlling civilization. How can a young man who travels to Blue Star become a stable dragon knight in this glorious world of beast control? ...