Proteus
Reflecting back only 6% of sunlight, Proteus is one of the darkest surfaces in our system. Several monestaries were set atop cliff faces after the formation of it's world tree. Studies of a... Lesser known diety is seen to have been what promoted the infection spreading. Many are affected differently by this mysterious ailment, many have very different ideas on how it came to be. Some suggest mutated food rations from the I.F.R , molds infecting the brain, magic curses, and so many more theories.