Underworld Passage

The Underworld Passage is a unique structure found in Xolin that allows access to the Subrosian Underworld to any faction that controls the settlement.

Description
A crack in the earth that leads to the Subrosian underworld.

Gameplay
The Underworld Passage cannot be accessed until the "Subrosia Discovered" event at turn 20 of the Freeform Campaign, at that point from which any faction that controls the settlement of Xolin can freely move troops in and out of the Subrosia Core territory. Its gameplay mechanics are almost identical to the Mirror of Twilight.