T13.1

The hallway snakes ahead of you and has no light source of its own.

Arrow Trap
Perception DC 20 There is a break in the stonework on the floor.

Disable DC 20: ''You follow the panel to a trigger and sever the rope. What ever it unleashed by stepping on this pressure plate, it won't anymore''

Trigger: Stepping onto the 5' plate, arrows spring from above. +15 vs Flatfooted, 1d8+1 of all. And Kobolds run out:

From R13
''You leave the clamor of the rat nest behind you and enter a long tunnel. It becomes cooler as you walk and you hear some scuttling noises''

From R22
The cold from the previous room subtlety subsides as you walk along the long tunnel.