Spiders and spider-relatives, naturally; all kinds. But strangely enough, not all of them respawn; Phase Spider, Sword Spider, Wraith Spider and some of the Giant Spiders and Ettercaps only live once, and are not replaced on future visits. Ettercaps, Giant Spiders, Huge Spiders, and Tasloi respawn. The entire eastern zone wall is a rocky escarpment and cannot be used to connect to or travel to other areas. The north edge is similarly impassable except in the north-western corner, although entry from the north brings you to a spot midway along the northern border.