The invasion of Kera, a small city in the Yalveran Union that span three kingdoms, was more significant than the city itself. Scientists and those who awakened epiphanies have warned about the other world for a while, and this proves their words. Therefore, the whole world was monitoring the situation in Kera.
A new species emerged from the gates, called the Skywalkers, with an organized army and a leader. This was the greatest fear of humankind: for the monsters to be united. Although this species was intelligent, humans learned it was an enemy as long as it came from the other side.
From the heaven-mountains of Shon to the great deserts of Sourna, the citizens all sat with their families to watch what the world called the Greatest Calamity.