Guardian of Time <Runes of Ascension>
This NPC can be found in Orgrimmar (1), Stormwind City (1), Stranglethorn Vale (1), The Barrens (1), Ironforge (1), Darnassus (1), Thunder Bluff (1), Undercity (1), Winterspring (1), Silithus (1), Shattrath City (1), Dalaran (1), Silvermoon City (1) and The Exodar (1).