To claim your Lost Continent Explorer's Pack, you will need to log into your NC Account. Once you log in, you can follow the instructions or watch the video at the bottom.
You can log in at: NC Account Management.
Click on the APPLY A CODE tab.
Next, click on the "Blade & Soul" tab. Then apply your code using the APPLY button.
Once activated you will see this message on the top of the page:
After activation, you will be able to find applied codes in your Transaction History: