Silas Darkmoon
This NPC can be found in Dun Morogh (2), Teldrassil (2), Durotar (2), Tirisfal Glades (2), The Barrens (2), Elwynn Forest (2), Eversong Woods (2), Ghostlands (2), Shattrath City (1), Mulgore (1), Darkshore (1), Ashenvale (1), Redridge Mountains (1), Duskwood (1), Loch Modan (1), Dalaran (1), Orgrimmar (1), Stranglethorn Vale (1), Undercity (1), Darnassus (1), Thunder Bluff (1), Ironforge (1), Silverpine Forest (1), Westfall (1), Silvermoon City (1), Bloodmyst Isle (1), Azuremyst Isle (1), The Exodar (1) and Stormwind City (1).