A vast network of dangerous caves and twisting tunnels under the Fangjaw Mountains, extending for many miles beneath the FaeWild Groves. Highly structured crystalline caverns form nodes in the tunnel complex, occasionally filled with stagnant water, noxious sulfur pits, or subterranean forests lit by bioluminescent fungi. The Depths serve as a nexus, linking the Fae-Wild Groves above ground to the upper levels of the dungeons below.