Astral Expanse

All the realms are connected via the Astral Expanse which is capable of being traversed by various magics, the most common of which are planar ships that are responsible for the majority of trade and transport between realms.   The planar realms are ruled over by a council of casters that ensure travel to other realms is contained to only those realms that have proven their realm is advanced enough to support planar travel as well as being able to provide support for themselves. Travel from realms that are not approved are prevented by a net that extends outwards from the capital realm of Zoatel (enhanced realm).   The net itself is a magical construct and planar travel cannot be conducted without the proper resonance key, provided by the Guild of Astral Travel Expertise.   Attempts to planar shift to a realm not approved is normally met with the intervention of the net, and if the net fails then a squadron of Nythrin’s Gossamer Wardens is dispatched to round up the perpetrators as quietly as possible. Their missions are to minimize the damage done to realms that are not ready or are not part of the greater open realms.