Not a world but a floating city in the void. This artificially constructed location was made to be a center point of the worlds. Its original goal was to find a way to unite the cosmos. That dream never happened. Problems rose from outside issues to internal conflict. More worlds were discovered then ever thought possible.
Necus is a gate between many worlds. It has struggled to get worlds to join in the network it offers. Many of the worlds it has portals to do not even know the portals are there. Some worlds kept the portals secret. While others fail to understand them. In many o the worlds where the portal is known about control of the portals remain strict. As worlds see them as a possible threat. It even helped end the threat of Omna, until he vanished.
After failing at its original goal to unite the worlds Nexus changed its mission.
Nexus became a beacon or exploration, research and a peace maker between other worlds conflicts. It started enforcing rules to keep stability and safety of all.
It became a beacon of knowledge and the police of interworld conflict. All was going well, until the day Omna returned.
Omna returned with a wave of power and force he never had before. His rath and pure destruction was unstoppable. The people of Nexus served as a point of hope. It took in people from countless worlds destroyed by Omna. Nexus worked to find any way to stop this monster. Nexus was key in saving people and slowing down the victory of Omna till a way to beat him came.
Now Nexus is working to repair the damage Omna inflected. It is overwhelmed with work. Devestated worlds are now easy targets or others to exploit. The refuges have populated Nexus to way past what it was ever made to hold. To top it all off with his return Omna reviled the location of countless new worlds that Nexus had no idea about.
Nexus has a blend of races and cultures. It is riddles with portals to other worlds that only open with permission. Its skis have flying ships that can travel between the worlds.
This is a place of wonder that has connections to many worlds and plains.