Ye Qing stared at the characters on the Stone Platform. If this really was the Secret Technique of the Indestructible Demon Body, then the origin of these characters needed to be investigated. One had to know, these characters were definitely from several thousand years ago, which meant they were most likely left behind by people from that era. Calculated this way, this Secret Technique was something people from thousands of years ago had left behind in the Demon Hideout Cave.
But who exactly was it that left this Secret Technique here?
