Light purple = ground covered in Kiakag, a disease that can make things look like-flesh monsters and makes the ground covered in fleshy vines. (it is very easy to hold back) Dark purple = where you can find nests for Xerv, very dangerous.
LIGHT PURPLE DOES NOT MEAN PERMANENT TERRITORY FOR THE XERV, ONLY DARK PURPLE DOES. light purple is just the spread of a disease, and soon the Xerv themselves.
