Earth 99

Humankind has spread over billions of years across the universe. Now every human is the equivalent of a high noble in this part of the Universe's caste system. They live for thousands or even millions of years and single humans rule kingdoms spanning hundreds of galaxies. 
The Universe is divided into at least a thousand realms, consisting of billions of galaxies. The only realm that has even been contacted by other universes is the Realm of Third Staratlas. In this realm humans are at the top of a caste system containing all the AI and subspecies descended from Humans. Carl Woden is the 47th Duke of Castleorb in the Imperium of Aevalon. He wants to go on an expidition to find the First Realm.
Indeed, there are legends of places so far away, that even with vessels that travel light years in seconds, they could never be reached in a single human's lifetime. Places like the First Realm and the countless realms on the other side. These places include Old Terra, the birthplace of humankind, rumored to have been consumed by the great goddess Sol billions of years ago. There are said to be great nations in that space like the Eternal Empire of the soulless minds, or the Great Republic of the 50,000 Estates.
== Notable Realms ==
* Third Staratlas: Home to the various incarnations. All humans are nobles who rule over vast empires of abhumans. 
* Bellum Eternus: A realm of constant war where the four factions of Cinders, Tempests, Globes, and Floods try to exterminate one another. Each faction manages to continue to wage the Millennia long war despite the fact that they are all themselves in a state of civil war to varying degrees. Galaxies themselves are weaponized as the fighting continues.
* The Deep: An entirely empty realm. Some say it was devoured by the unknowable gods of the Soulless minds. 
* Shatranj: A realm whose rulers are chosen by an extremely complex boardgame. In extremely high levels planets and even galaxies become the pieces. 
* Second Coldglobe: A realm populated only by sentient machines.
* New Haven: A once great realm reduced to medieval levels of technology... again. 
* The First Realm: A legendary space, said to be the original home of humanity. Legends say that it is still in the middle of a ceaseless war between the Republic of 50,000 estates, and the Empire of the Soulless Minds. Supposedly all the realms behind the Republic's zone of influence, while machines were able to colonize and settle behind the Soulless zone of influence.