Vermulean

Vermulean was an enchanter who lived in the woods, outside a village in Icewind Dale, which was raided by the drow.

History
He was a humble old man who offered to enchant gemstones, free of charge. These enchanted gemstones could protect the owners from radiation that emanated from underground, and allowed them to see in the Underdark. He was knowledgeable about the ways of the drow and Menzoberranzan.