First, there was 2 tribes. Pyrus and Subbterra. They were sworn enemies. The Pyrus Tribe and The Subbterra Tribe wanted to torture the other. So the expanded and the Subbterra Tribe created the Aqous Tribe. So the Pyrus Tribe created the Haos Tribe. Then, the Subbterra Tribe wanted to beat them even more so the created the Ventus Tribe.
So that's how the elements were created.
Next, the Tribes went against there conquerers and won which created the 5 separate elements.