You head to the left. You trail the fingers of your right hand along the wall to keep yourself on course. A moment later, the blue light beyond the roots disappears from view, leaving you in utter and unrelenting darkness. The air smells dank and musty. After plashing through a couple of puddles, the ground becomes flat and dry.
As you walk, the wall curves to your left. You feel irregularities in the otherwise smooth surface. It occurs to you that these must be inscriptions, perhaps in the old Cathayan script. Who knows what secrets they might reveal, if only you could read them? But you can do nothing but stumble along in darkness...
After you have walked a short ways, the wall opens up on your right. Feeling around indicates that this is an archway; the passage continues on ahead of you. Which way do you choose?