Keep your friends close and your enemies closer. Through this weekend and for a limited time only, you can change your World of Warcraft character’s faction from the Horde to the Alliance (or vice versa) for 25% off the regular price.
To get started, simply click here. Alternatively, you can log in to your Battle.net account at eu.battle.net, select your World of Warcraft account, and then click “Faction Change” at the bottom of the page.
Don’t delay -- this offer ends Monday, July 16.
Fuente: http://eu.battle.net/wow/en/blog/5449279/Weekend_Sale_%E2%80%93_25_Off_Faction_Change-13_07_2012