There is the Aesir traces here, there is the jade Empire traces and Olympus and many others.
What so special about Earth? Maybe now that they have the World Orb that they are more valuable or more important.
But what about before?
He once read that these deities and Gods once waged a war. A Great War that spans galaxies and dimensions and even Time.
He read that form the Forbidden History books that he bought from a merchant of Sarens.
He believes that the war was fought on Earth.
But if they did fight on Earth, it is a curious thing that Earth still exist. One swipe of their hands could bring down hundreds or maybe thousands of planets like Earth to crumble
Yet, the Earth did not perish. There is so many things that he finally realizes he does not know. There is still a lot of secret that needs to be discovered.