C60 Sea Fortresses and Underground Tunnels

Because shipbuilding takes a long time, but fighting pirates is an emergency. Thus, after some discussion, Lil'Dino decided not to build a new ship. Instead, he asked Arthur to gather the craftsmen and modify the Argo. Relying on the little dragon's human memory and the knowledge he learned in Soraya Empire, Argo changed from a merchant ship to a "battleship" armed to the teeth