Emblematic

Emblematic is a Feat of Strength achievement gained by earning any of the following emblems:
 * Emblem of Heroism
 * Emblem of Valor
 * Emblem of Conquest
 * Emblem of Triumph
 * Emblem of Frost

Letters
Alliance players recieved a letter from Arcanist Uovril on achieving this Feat of Strength:
 * Alliance

Horde players received a letter from on achieving this Feat of Strength.
 * Horde

Note
As all the requisite emblems were removed with the implementation of patch 4.0.1, this achievement is no longer attainable.