Thelgen Rock is an area in the southern Wetlands that is crawling with poisonous spiders. The name refers to an extensive cavern that stretches deep into the mountains. The caves hold deposits of , needed for the quest Search for Incendicite. The spiders can be farmed for , though the drop rate is modest. Frustrated cartographers can also be seen roaming the area trying in vain to explore the last piece of their maps.