Thread:Sqrrl101/@comment-82.41.96.246-20180820180852

Xustea is populated by swarming hyperefficient moss that processes anything it can touch and is slowly eroding the world down to its molten core. It's fast enough to threaten settlements and impossible to keep out; what little Xustean life exists is evolved to keep moving, and so must the human settlements, forming gigantic roving convoys of slow-moving house-vehicles. 