All but one of the portals in Umbral Hall were destroyed by Asheron's foray into opening a portal to the lost Empyreans in the Shifting Gears event. MacNiall's Freehold is the only town portal remaining, located in the South branch. The drop is hot - be prepared to be met by a number of Shadow Lieutenants upon entering. Umbral Hall was known as "Super Sub" because there used to be a wide variety of town portals inside. It is still an excellent place to hunt for pieces of Shadow Fragment, and for Idol Gems.