This is the RP's Plot.
There were two dimensions at peace the Anti-Dimension, and our dimension. Both dimension had no idea of each others existance, that is untill today... A rip in the space time continnum. This happened when the Anti-Avatar was experimenting on something and ending up tearing a hole between the two universes. Because of this the Anti-Avatar died. Once the new avatar was born in the Anti-Dimension war broke loose. The new Anti-Avatar's mother thought it would be safer for him to be raised in our dimension. He grew up here thinking he was the normal avatar here when he later found... Avatar Lu. War has become of the two dimensions now Avatar Lu and Avatar Eclipse must train to make peace between the two dimensions.