OOC:
For the sake of sensemaking, I'm going to shift around some of Bilda's actions. :)
You all reach the end of the tunnel and find yourselves at a T juncture, with new paths stretching off to the left and to the right. Dustin quietly looks around and turns left, heading off down that tunnel. You proceed down, the tunnel being very narrow. It bends and weaves for a few hundred feet, but Dustin keeps his pace, looking about every so often as if retracing things in his head.
The path bends back on itself sharply, leading to a set of stairs climbing up. As you all proceed up the path, Dustin slows, moving more deliberately as you go, as quietly as he can. When you reach the top, some 300 feet or so ahead, you find yourselves in a large room with a staircase off to the left, and two paths in front of you. This chamber is full of softly dancing lights in every hue imaginable. You see massive crystal formations growing up from the ground, and the statue of the deep gnome that Dustin had mentioned is standing near the center, cowering by a crystal. In one hand he holds a chunk of the semi-transparent stone, almost as if he was looking through it. Peering through the large crystals, you can easily tell that they distort the image beyond pretty substantially.
Dustin gestures to the leftmost of the two tunnels leading away from this room and makes a motion with his hands that look like snakes on his head.
Bildaweer, at this point, casts Invisibility on Dustin. Ozzy flies off towards the entrance to the chamber, and sees that the tunnel is about 50 feet long, and a dark chamber sits at the other end.