UrRu

The Mystics also known as the Ur-Ru are an ancient race of kind four-armed lizard-like creatures from The Dark Crystal. They are the opposite of the cruel Skeksis.

At the last Great Conjunction, the urSkeks were divided into two races -- Mystics and Skeksis. The four-armed Mystics (also called urRu) took on the sorrows of the world. They inherited the mystical wisdom of the urSkeks, but were powerless to use it outside their own valley. Their hopes for redemption rested on Jen. There were originally eighteen Mystics, but by the time of the Great Conjunction when they rejoined the Skeksis, only eight remained.