Chapter 517: Supreme Beast Race, Black Heaven Demon Emperor!**

"Aung! Aung! Aung!" From the mouth of the demon dragon came ancient dragon roars, reverberating through the heavens. In an instant, the surrounding void trembled, winds and clouds shifted, divine light surged forth, and a vast devouring force spread out. Within a radius of ten thousand miles, all the spiritual energy of heaven and earth converged like a storm, rushing into the demon dragon's body. Around the dragon, it was as if a black hole had formed, devouring the abundant and potent spiritual...