Many ,many years ago, before the existence of human, this Earth was being dominated by dragon species for many generation, they are the 1st tier ruling class of this planet.
After many generation of evolution, there are different species and different intelligent level of dragon species, some species evolve into a super intelligent species, they havse gain super natural power far beyond the imagination of human. For some reason thosesuper intelligent dragon species did not leave any remain and trace of existence now for human to trace. All human can find is only the remain of low level dragon species.
The true extinction reason of the dragon species only lay beneath the evolution cycle of this super dragon species.
(The rapid evolution of this super dragon species possess the power alert other advance life form in the universe, this super dragon species possess a highly evolved pineal gland,
which enable them to develop a very advance 3rd eye that can see through future and a rapid self taught self learning system , that enable these super dragon species can learn by instinct, with this capability the super dragon can evolve closer to the Universal Mind.
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once these super dragon species attain this level closer to the universal mind, they will enter the rank of supreme being in the universe. This will threaten the already existed supreme being in the universe, thus the few supreme being join together to eliminate the entire dragon species on this Earth. But according to universal Law, even the supreme being need to follow the protocol of the evolution in the universe, they cannot eliminate the entire life form in the planet filled with organic life before, so once the dragon species being eliminated , the supreme being need to create or (find) another life form to fill the gap of this Earth. So, after vigorous discussion among this supreme being, they co create a life form with part of their DNA and part of the DNA of the original life form on Earth.
This give rise to the human species on this planet, but with the intelligent level of super dragon species , they already predict the act of the supreme being, so part of the race already hide deep inside the Earth. They hide deep down in dormant form to wait for their time to come and gain back dominance on this planet and they will remember how the supreme being eliminate most of their race. They will come back and take revenge on the descendant of the supreme being.
The revenge of the super dragon species and their descendant toward the supreme being descendant on this Earth will lead to the awakening of the dormant DNA on the desecndant of the supreme being. In order to survive from extinction the human life form of this Earth have to carry out Phoenix Project