Are you ready to take on the daunting task of achieving Loremaster?
Then this is the guide for you! This guide will provide some simple
hints, tips, and general information to help guide you on your questing
journey through World of Warcraft, hopefully making this achievement a
little less painful to accomplish.

Once completed the
player will receive the [Loremaster’s
Colors] 
(a tabard) which will arrive in the mail attached to a letter from one
of the leaders of your faction. Alliance will receive a letter from
Tyrande Whisperwind entitled “Greetings From
Darnassus“, while Horde players will receive a letter from
Cairne Bloodhoof entitled “Greetings From Thunder
Bluff”.

Read more href="http://www.tentonhammer.com/wow/guides/loremasterachievement"
target="_blank">here.