The end of humanity came with the end of the universe, as it had lost all of its energy trying to sustaining human life but humanity had grown at an alarming rate cause the rapid collapse of the universe. At the beginning of the end it was a few stars suddenly going out before they were supposed to but it had quickly escalated when half of the stars within the universe went out all at once. Even at the very end humanity was still completely oblivious to the situation even when they were being disintegrated. However, some did notice and they figured it out quite easily with their technology. Even then it wasn't enough time to save everyone so they selected 10,000 people to save and send their souls to another universe with universal frequencies that were similar to their own. However, due to the rush, they had read the frequencies backward, causing them to land in another world filled with magic and terrible beasts cable of destroying towns.
With the event later known as the great crossing, the new humans started to notice something and that was the fact that they were not cable of magic. At first, they were distraught but as time went on they realized that not everyone could use magic within this world but have created alternatively with their own body. This power was called aura, where they perfect their bodies and it starts to generate energy to go beyond human capabilities which were fascinating to the sciences that came along to this new world. They had started to experiment on the people with aura under the promise of helping them get stronger, stronger than even the mages.
The results of the experiment concluded that these people somehow made their heart like the heart of a beast so with this new information they started to use the blood of a beast to see how it affect these humans. This experiment started a new age within this world where people without mana could stand out even among mages. The result of this research had caused the strongest mage at the time Solomon Crest to fight against the human with dragon blood Abraham Caster to a standstill for 3 days and nights with the final result being a tie with Solomon losing an eye and Abraham losing an ear.
During all this unknown to anyone, one of the original 10,000 souls that were supposed to be dead had come back to life as a core, a dungeon core.