To use your player-minted NFT in Medieval Empires after listing it on a marketplace, you’ll need to delist it from all marketplaces and re-add it to the game. When your NFT is listed on a marketplace, a red cart icon will appear on it, and the "Add to the Game" button will be disabled.

Here is how you can delist the NFT from the marketplaces and add it back to Medieval Empires. The process for both Sphere and Tokentrove is shown below: 

Step 1: Remove listing your NFT on the Marketplaces

Step 2: Confirm the Cancellation

Step 3: Sign the Request in your Wallet Pop-up

Step 4: Your NFT would then be Unlisted

Step 5: View your NFT in the game

Once you’ve delisted the NFT from all marketplaces, the red cart icon will disappear, and the "Add to Game" button will become clickable.

Step 6: Click the 'Add to the Game' button

A prompt will appear asking you to confirm if you want to move the NFT from the blockchain to the game. Click and hold the button to confirm.

Step 7: View the Unit in the Relevant Building

The NFT will then be "burned," and the unit or decoration will be added back into your game in the relevant building.