Githyanki

The githyanki were motivated by revenge and convinced that they deserved to take whatever they wanted from the worlds they traveled. Ranging out from the titanic city of Tu’narath on the Astral Plane, they send raiders out to plunder the Material Plane and other worlds, bringing treasures and slaves back to their ageless realm. At the same time, they hunt down and kill mind flayers whenever possible, as recompense for what the illithids did to them.