Legends attribute the formation of this canyon to an ancient battle which took place even before the nation of Danasia existed. Stories depict a lone martial artist, simply known as The Warrior, that fought and defeated a great beast with a single, mighty strike of his sword, cutting through it and deep into the earth.  

It's impossible to validate the veracity of this tale, though it does offer an explanation to the unusual amount of residual ki that pervades throughout parts of the canyon.