Royal Seals are an important part of the Castles ecosystem, they are used to refresh Baron land claims, Castle claims, craft new farms and they are also used as an ingredient in many coming crafter and wonder NFT events.
One Royal Seal costs $5 USD in Wax direct from the developers. The Royal Seal Courthouse Wonder, rewards 50% of the Royal Seal purchases in Wax with other owners of the wonder bounties. See more about Wonders to see how this works.
Players can craft their own royal seals daily with the ultimate land, the Castle. Which makes Castles one of the most desired assets of the game.