If the Yu-Gi-Oh! DB website asks to login with Game Card ID just click "I don't have a game card ID" and fill some basic information to proceed
Export Guide
- Via the MDM extension (Recommended): Download on Firefox, or Chromium Browsers For Chromium browsers (Chrome/Edge/Opera/Brave...etc) just click "Add to chrome" on the store page and it'll work on most if not all chromium browsers. After using the extension, go to the Master Duel game => Main menu => Deck option => The Card database option at the top right corner => locate the deck you exported and copy it
Once the deck page loads click Edit then do one of the following based on the platform your device is running:
(PC Only): Press F12 to open the DevTools window => Navigate to the Console tab in the window => Paste the export code => Hit Enter
OR (Other platforms/PC): In the address bar of the current tab remove the URL and type "javascript:" without the quotations then paste the export code, then if you're on mobile look for the *globe* icon and tap on it to run the code (Chrome only), for PC users just hit enter.
The deck will save automatically
Go to the Master Duel game => Main menu => Deck option => The Card database option at the top right corner => locate the deck you exported and copy it
*This campaign may change or end without prior notice.
*This campaign may be held again in the future.
*Malicious activities using multiple accounts will be subject to usage restrictions.
*The inviting and invited players receive the same "Starter Deck (Friend Invitation Campaign)."
*Rewards can be obtained by successfully entering the code and becoming friends.
*If an invited player unfriends the inviting player immediately after claiming their reward, the inviting player may not fulfill their mission requirements. If that happens, the invited friend must re-friend the inviting friend while they are logged in.
*There is a limit to the number of people a player can invite.
*The friend list on the dedicated campaign page shows up to 20 friends in the order they were friended.