Since the shrine of Aviana has fallen into disrepair, the Wormwing harpies have snuck in and stolen the last of our druidic relics. One of these, the Jewel of the Horizon, is a sparkling blue stone blessed by the feathered goddess herself. The touch of Aviana may have just the magical power that you need for your task. The Wormwings have doubtless hidden it in or near one of their nests. When you find it, take it to Ketharas.