From WoWWiki

Highlord Demitrian is a level 62 quest giver located at the Ravaged Twilight Camp in the contested territory of Silithus.

Demitrian was recruited at an early age by the Twilight's Hammer, who found him a willing and able student of the Shaman's art - a rare feature in a human. He grew quickly in rank and power, earning the rank of highlord at an unusually young age. Unfortunately, his brashness led to overconfidence. While serving at a post in the Crystal Vale in Silithus, he learned secret ways to soothe and control the enraged air elementals there. Convinced he could bend any elemental to his will, he dared assault an enormous wind elemental called Thunderaan. Instead of taking control of the elemental, Demitrian fell under its sway. Soon after, the forces of air demolished the Twilight's Hammer outpost, but Demitrian was allowed to live as Thunderaan's servant. Now he searches for the remaining essences of his master, torn from him by Ragnaros in ages past.^{LoM 55}

He starts the following quests:

•  [60] Examine the Vessel
•  [60] Thunderaan the Windseeker (Raid)

See List of Silithus NPCs.