Inspired by Role-Playing Games and the world Metaverse with Blockchain technology, we build DragonSea as a Mystic Dragon world, where there are all the elements so that players can freely immerse themselves in a real virtual universe. Here players will play the role of Dragon Riders. Players will build not only their own dragon kingdom but also lands with different constructions and items obtained in the game. Besides, in the game, players will own real Dragon warriors and train these Dragons from the beginning until becoming a dragon warrior with unbeatable strength.