Toad
This NPC can be found in Swamp of Sorrows (11), Arathi Highlands (2), Silverpine Forest (7), Terokkar Forest (4), Eversong Woods (8), Shattrath City (1), Nagrand (88), Undercity (1), Wetlands (30), The Steamvault (2), Dustwallow Marsh (69), Un'Goro Crater (37), The Barrens (6), The Underbog (6), Ghostlands (11), Zul'Gurub (6), Teldrassil (31), Darnassus (32), Black Temple (12) and Howling Fjord (7).