Quachil Uttaus (The Treader of the Dust), is an archdemon and/or god of entropy. Among his reputed powers is the ability to reduce all living tissue he comes into contact with to dust. Quachil Uttaus is usually associated with age, death, and decay. Summoning this demon is considered lethal, if one even subconsciously entertains thoughts of suicide.
It is noted for the acceleration of entropy that occurs in its presence. His guise on the mortal plane is usually a mummified humanoid with withered, bone-thin arms and unnatural, ever-grasping hands. Also known as "The Ultimate Corruption". It may have been known in ancient Great Mbo as Ka-Rath, "The Keeper of the Dust".