With episode 13.1 comes two new guild dungeons. Like the old guild dungeons, they are accessible only to the guilds that control a guild castle in that realm. The Schwaltzvald Guild dungeon is no different, and is accessible by any guild currently controlling a WoE:SE castle within the Schwaltzvald Realm. Again like the old guild dungeons, the new ones are considered PVP zones were non-allied guilds can attack and fight each other at the risk of experience loss on death.
The Schwaltzvald guild dungeon is inspired by the Juperos Dungeon architecture, and has new monsters similar to those that you'd find within Juperos and near the Einbroch area, but considerably stronger and worth higher experience.