Moss is green, slimy stuff that grows in random places all over Wurm. You cannot run very fast when walking through it, so do not head toward moss when being chased by a ravenous beast of some sort.
To harvest moss, dig on the tile with a shovel active
Moss tiles behave similar to clay tiles (you may dig in the center of the tile to receive an infinite harvest of moss without lowering the tile and you may throw dirt on top of the tile to raise it).
