Here are the steps on how to use Promo Codes when shopping at blackdesertonline.com: Sign in to Black Desert Online or create a new account to add your favorite products to your cart. Then, click Pay, select the corresponding available Coupons, and select your preferred payment method. Please note that each Black Desert Online Coupon Codes has its own rules of use, if your order is eligible for blackdesertonline.com, it can be used.