The prologue. Before appeared Ninjago...
...in its place there was another world. In those days the gods lived among mortals, taught them wisdom and gave rise to the light of the demigods, the heroes. It was an age when good and evil were on par with each other and formed a harmony. But the balance was violated when the new generation of both parties wanted to rise above others. Started enmity, behind them the same endless war. Brother stood up against brother, killed their descendants of the same ancestors, and when those did not, they began to enslave other peoples. Immortal left the earth and went back to heaven, thence observe what is happening. Though people were killing each other, this world was still hope for the best, as long as were live Keepers. Keepers of the world were Black Dragons. They were the embodiment of darkness, from which emerged the world. In other words, the truth that never dies. They were a bridge between the world of mortals and the world of the gods. And when it was dark times, many people came to him for advice, for help and for predictions. Thanks to them the world is gradually began to recover. But, unfortunately, the current rulers have not seen anything of the divine and promised gold to those who get their heads Black Dragons. Began the extermination from adult and ending up not yet valueflags eggs. Not knowing where to go Black Dragons, being, possessing strong Supreme magic, turned to the people and were hiding among them. But there reached them. People were divided into two camps: some were saved magical creatures, the latter killed them. Every extinct dragon heaven and earth trembled and published such terrible sounds as if something were trying to break into their world. And here at the end of this world, when all the dragons were destroyed, it was covered with darkness, vile creatures attacked peaceful citizens and in the sky gradually began to open the Dark Portal. The Oracle predicted that the end of the world is nigh, and it is the fault of mortals, killing Custodians. After all, stop this can only Black Dragon. It seemed that salvation is not. But like a ray of the sun is shown in the clouds, also there is hope. Four Kings, warriors were able to find the last of the Black Dragon, who was hiding in the form of a mere mortal. Made a last effort, and having overcome all the obstacles, they reached the top of the World, where the last of the Guardians had to fight against the main enemy and close the Gate. However, at the last moment he was interrupted, but because of the sacrifice that is offered by kings, helped the Dragon at least close the Portal. In the end there was a great explosion, which killed half of all life on earth. And the war and the Keeper... from four kings left their weapons natural elements, and from the Dragon staff. The staff, which was assembled and created from parts of the bodies and were now the key from the Dark Gate. The sacrifice kings sacrificed for the salvation of the world. But the story does not end there. Legend has it that when the time comes, the Gate of Darkness opens again. And only the descendants of the Custodian and kings, warriors will finish what we have begun their ancestors. And when the world will experience the second Apocalypse, he would be different.
(Sorry for my English.)