This prepaid card gives you a 30 day subscription to World of Warcraft. You can continue your game for 30 days without having to use a credit card. To add your prepaid card to your account, please follow these steps: 1.) Log in to your Battle.net account. 2.) Then go to “Your Game Accounts” and then select the WoW gaming license that you would want to use on your prepaid card. 3.) Click on the “Add some playing time”. 4.) Then enter your cd key prepaid card and click on “Redeem Code”.