The Title of World Bearer granted to him by the World Stele gave Rowan the ability to reach outside of Reality and steal a foundation that could be used to stabilize the dimension of an immortal inside of Reality.
Without being a World Bearer, an immortal who wishes to place their dimension upon Reality would have to do that on the power of their Essence and Aether alone, and no matter how powerful they were, this sort of consumption was not sustainable in the long run.
Rowan did not know if other immortals knew the truth about what the power of a World Bearer granted to them by the Singularity truly was. They believed that the foundation of their dimension came from the Nothingness, and the power that held up their domain was some mysterious force that no immortal could comprehend.
After seeing Limbo, Rowan became aware that this so-called foundation was a connection to a place outside Reality because Nothingness and Reality were the same place, two sides of a single coin.
