Lexicon of Power
This object can be found in Borean Tundra (2), Howling Fjord (2), Dalaran (1), Stormwind City (1), Orgrimmar (1), Thunder Bluff (1), Undercity (1), Silvermoon City (1), Ironforge (1), Darnassus (1), The Exodar (1) and Shattrath City (1).