From the in-game marketplace, you can have NFTs such as supplies and foods, which are necessary to play the game. You can also find NFTs such as ownership equipments and ports that allow you to earn more.
You need to combine your cards in order to have the next level NFT Cards. You can have the next level ship card by combining 4 cards of the same level belonging to the same ship in your inventory.UPGRADE NOW
But this rule is a little different for Galleon, which is the best rarity that can only be obtained by combining. You will need a Escudo Coin in addition to 4 Carracks to get a Galleon.UPGRADE NOW