Snake
This NPC can be found in Dire Maul (23), Silverpine Forest (6), Desolace (19), The Barrens (24), Stonetalon Mountains (3), Wailing Caverns (40), Maraudon (23), Un'Goro Crater (15), Tanaris (2), Silithus (1), Dustwallow Marsh (47), Thousand Needles (2), Zul'Gurub (88), Westfall (15), Tirisfal Glades (1), Feralas (18) and Sunken Temple (27).