Per the Lodestone update on this mob (12/13/2010):
Appearing in ancient religious manuscripts as loyal servant to the sun goddess, Azeyma the Warden, this peiste is unique in that its brilliant silver scales reflect the light, making it seem that the creature is constantly emitting a radiant glow. Many a hunter has set out into the mountains in pursuit of this scalekin's rare skin, only to succumb to the monster's razor-sharp fangs, nail-like claws, and petrifying gaze.
A little more information would be helpful to the community vs. "I killed it, no drops". How about the number of members? Time it took to kill? Time of day it was? Any special moves?
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Jerri Blank (Strangers with Candy): "I may still be doing all the wrong things, but now i'm doing them the right way!"
We took about 13 people out between rank 40 and 50, it took about 25 minutes for us to kill it. It appeared at night, although I couldn't tell you if that's the exact spawn window or not.
It's acts a lot like a regular peiste does as far as I could tell.