The Valley of the Fallen Phoenix was named after a pure-blooded phoenix.
Around 1,000 years ago, a pure-blooded phoenix was born. Then, under the attack of many omnipotent, it, unfortunately, passed away and then disappeared without a trace.
Everyone questioned whether that real phoenix resurrected or not. Many people also came to find the Nirvana Fountain of Real Phoenixes with a "why not try" mentality and sadly, they all left disappointed.
Before long, everyone gave up and no longer thought that the real phoenix left behind a Nirvana Fountain. However, this became an unsolved mystery of Tianzhou.
All because two big suspicious points were never solved. First of all, where is the corpse of the real phoenix? Second of all, why isn't there the Nirvana Fountain of Real Phoenixes?
When a real phoenix dies, it will for sure leave behind a corpse. If it is alive, it will for sure create a Nirvana Fountain. Or else there would be no way for the phoenix to resurrect.