After the death of two powerful tribes, Igutus and Neanderthals who were destroyed till the end of their species. The lgutus had blue blood and the Neanderthals, who were the strongest had purple blood, that made them different from other people. The Igutus and Neanderthals were fast and strong before they killed them until a new bloodline of their species was formed when an alpha male Igutu slept with an alpha female Neanderthal and they formed the Nanians from the Nania tribe in the North.
After a few years, the Nanians multiplied in number and grew stronger and decided to stay deep in the North where they could not get harmed. The people of the outside world were all scared to cross the forest that takes you to the North. They believed that whoever crossed the forest would die.One of the survivors from the outside tribes believed that the Nanians were the descendants of the Igutus and the Neanderthals .The Nanians would hunt and kill during the night without rest. It was also believed that the Nanians were immortals and killing them wouldn't be that easy. They also gained enhanced speed, strength and agility stronger than that of the Igutus and the Neanderthals.
This spread all over Arthdal that contained different tribes that killed the Neanderthals and Igutus ages ago.The soldiers of Arthdal decided to enter the North and destroy the Nanians once and for all. The proud Arthdal soldiers raised their swords and shields and ran to the forest and reached the territory of the Nanians. As soon as they reached ,the soldiers who were behind were carried away in just a blink of an eye. They tried to fight the Nanians but they were all killed. They were all killed by only three Nanians without a single scratch on their bodies showing how strong this tribe was. The bodies of the Arthdal soldiers were torn into pieces and compiled in sucks. When it reached night, the people of Arthdal were happily celebrating hoping for the Arthdal soldiers to arrive with their victory but the leader of the Nania tribe arrives in Arthdal, injuries the guards who are guarding the whole place.He arrives front of the people of Arthdal and elders with a horse carrying sucks of dead bodies.The whole of Arthdal filled with silence asking themselves who that is and what is inside the sucks he had come with. The leader of the Nanians shouts in a very loud voice,, "I am Kai, the leader of the Nania tribe, listen to me carefully. None of you had the right to enter our territory again nor attack us. We won't hesitate to come and kill all of you. We won't harm any of you if you keep my word."
Kai turns around and leaves leaving the people of Arthdal in fear. One of the guards opens the sucks Kai left behind. They contained all the body parts of the Arthdal soldiers who were sent to Nania.