Mysterious Device
This NPC can be found in Hellfire Peninsula (3), Icecrown (3), The Storm Peaks (1), Dragonblight (2), Borean Tundra (2), Nagrand (2), Sholazar Basin (2), Stranglethorn Vale (2), Ashenvale (1), Darkshore (1), Dustwallow Marsh (1), Alterac Mountains (1), Howling Fjord (1), Terokkar Forest (1), Westfall (1) and Zul'Drak (1).