Solo Battle - During each sail, the player has the opportunity to fight Raid Bosses that are on the map near the players location. There are 5 bosses in this game and each of them has five levels. Which and what level of bosses the player will be able to fight depends on the level of the pirate, the number of ships, and the level of the main ship. After defeating the boss, the player will receive a Mystery Box corresponding to the level of the boss, where it is possible to find coins as well as other in-game items or various parts for crafting a ship.