Sunvale was a sleepy community when the heroes first entered it, a place to drop off their employer Casinal while they explored the Forest of Woe. It later became a centre of operations for them when they saved the townsfolk from the foulspawn that Casinal’s runestone had attracted. Eventually, it was discovered that Sunvale had once been known as Gatetown, because of a stable gate to Sigil that had closed many decades prior. Batal, Wrathy, and Elzin have a mysterious ability to open the gate. Once the gate was re-opened, Sunvale became a place of great commercial and strategic importance. It is rapidly becoming the major boom town of the empire, and possibly the continent.