Collect 10 Shadowshard Fragments from Maraudon and return them to Archmage Tervosh in Theramore on the coast of Dustwallow Marsh.
I've recently begun testing various crystals and their arcane properties. Lady Proudmoore has given me leave to ask travelers heading into Desolace to seek out a place called Maraudon. Within the ruined temple are great elementals composed of purplish stones I've named shadowshards.
If you decide to head that direction and find some of the crystals, I would be very thankful. I could even fashion you a trinket from them if you so desired.