Speak to Pebble in the Shuddering Spires. If you stay on the ground long enough, he should come out of hiding to find you.
If you hadn't noticed, there'd a very small elemental that has taken a liking to you. If you stay on the ground for even a few moments, I'm sure you'll spot him.
You seem to be quite adept at making friends down here. A good talent to have.
Also, you get: 86
<Pebble seems quite happy to meet you.>
Upon completion of this quest you will gain: