Toad
This NPC can be found in Nagrand (93), Dustwallow Marsh (75), Un'Goro Crater (37), Darnassus (32), Teldrassil (31), Wetlands (30), Swamp of Sorrows (11), Ghostlands (11), Silverpine Forest (8), Eversong Woods (8), Howling Fjord (7), Zul'Gurub (6), Black Temple (12), Arathi Highlands (2) and Coilfang: The Steamvault (2).