The Shadow Plane is a broad extraplanar frontier surrounding Gurthel-thalanee, the Black Gates, and the jungle routes leading back toward the fortress. Its humid forests, drowned channels, broken highlands, and impossible bridges support scattered settlements, expedition camps, and fortified crossings. The realm feels alive but emotionally distant, as though every landscape remembers travelers who passed through it. Trade, investigation, and survival depend on understanding shifting geography and dangerous planar boundaries.