As S'sylin prepares to go down the passage, he hears the trap activate from the main room.
When Turchuk, Astrid and Verin step through, they have just enough time to see dank and musty stone walls with moss growing in the cracks and water seeping in gradually through the stone ceiling. Every ten feet or so, a bookshelf sits, full of tomes that are not only chained to the shelf, but also locked in the same way the front door was. One book that seems grander than the rest, sits open in the middle of the room on a pedestal. Gold fillagree and illumination cover the pages, but the finery is faked.
Then the air is filled with a mind-ripping cacophony.
OOC:
DC 12 DEX save to halve damage, or DC 15 CON save to resist it entirely. Damage as noted in the roll below.