“It is clear to me at this point what must be done, adventurer.
The naga can only be obtaining these pearls from one place: Nespirah, the ancient, shelled creature that rests outside of this cave. Why Nespirah would submit to the naga, however, is beyond my understanding.
We can enter Nespirah's body cavity through a small tube near the exit to this cave. I must first fetch my master, then we can meet you on the inside. We will convene in Nespirah's northwestern entrance.”