The listing, Black Desert Online(Closed Beta Key) has ended.
first Closed Beta event will take place next week, running from Wednesday, December 16, at 07:00 am UTC until Tuesday, December 22, at 07:00 am UTC
You'll be able to download the client starting on Monday, December 14, at 4pm UTC.
Enter your Closed Beta code in the “Register your CBT 1 Key here” field and click register. After successfully registering your Closed Beta, your account will be automatically be unlocked for CBT1 phase for Black Desert.
https://www.blackdesertonline.com/