The Sisters of Yin and Yang

Why do we hate each other for our differences? The six dragon tribes are separated by something they cannot control, their elements. Now there is a secret prophecy to unite. Will it stop the blood flow?
War is brewing, but not amongst the six tribes. It comes from a secret evil. The tribes?
Oblivious.
Two sisters, separated by blood, must dash aside their hopes of a normal life and join them together against a common enemy or fall into oblivion along with their gods.

This story takes place in an alternate universe, in the land of mother's haven. In this world humans do not exist, and the creature on top is the dragon. The story is written in third person, present tense, and follows the adventure of two main characters on a fast pace, action packed adventure to save the tribes.