Placing the Gold Mask and examining the lantern ends the chapter: you are carried off to a fight and the castle is gone for the rest of the run. Save at the Dungeon typewriter first, and make sure you have everything below. Files (9): The Megamycete Theorem (Laboratory), How to Preserve Rabbits (Treatment Room), The Liquid Void (Bedchamber), I Tried to Combine Some Things (Northern Stairwell), On Mutamycete Disruption (Workshop), On Movement Disruption (Dressing Room), The Masked Duke's Diary (Salon), The Gallery of Despair (South East Wing) and Shotgun Shells Should Help (Terrace Room). Trophy: Craftsmaster, with one of each of the four crafts done. Optional: the High-Capacity Mag. and the Compensator for the LEMI, and both Pipe Bombs (Main Cellar vase and Isolated Passage).