The Stones of Vekh'nir

The arakkoa of Vekh'nir have been a thorn in our sides for many years. Some strange religion guides them, a religion which has the arakkoa in a frenzy of activity. They carry these crystals with them now, which they have turned to some dark purpose.$b$bI know something of their rituals. They take the crystals to their spell circles to infuse them. We at the village would like to know more. Waylay a few of the arakkoa until you find a crystal, charge it, then return it to me.