Githyanki (/gɪθˈjænki/ gith-YÆN-ke)
The githyanki were a race of Astral Plane-dwellers. Survivors of a long enslavement by Mindflayer, they became ruthless pillagers and raiders of many worlds in the Prime Material Plane.
I really do try to make most of this original, but since Forgotten Realms is an integral part of the world I can't help if anything is used without formal permission, but is still "fair use" as I am just using this for my private games.