Duorbis: Collision of the worlds

This is the story of two worlds: the upper and lower worlds. Both worlds have their own creatures and populations of people that differ. The people in the lower world are called warlocks. They are a race of arrogant warriors and have horns coming out of their heads and big muscular bodies. The ones living in the upper world are an entirely different race of disciplined and elegant people called sorcerers and have slim bodies with pointy ears. They both have developed their own powers, which are unique to their race. For example, a sorcerer can't use the powers of warlocks and vice versa. However, they didn't know of each other's existence. After a very long time, these two races eventually discover their life on the planet, which they can see very clearly in the sky. They start to communicate with each other and establish diplomatic relationships. However, this would not last long...