[Planescape] a city of Githyanki and Githzerai; my players keep out!

[whydirt]

One of my players in a new game is playing a Githyanki who's part of a rebel faction of Githyanki. I thought that it'd be cool to have him discover a hidden city of both Githyanki and Githzerai who are living together in relative peace.

Anyone have any ideas on where the city should be located or how to flesh it out some?

 

[Renaissance Man]

Where? I'd shoot for "when". A demiplane trapped in the multiverse's distant past, just prior to the sundering of the gith peoples.

 

[whydirt]

It's just crazy enough to work!

Thanks for the idea.