Andrius asked permission from Elandir to use the route from east of Zemaria going to the south of Qiryn to enter the waters of Vrenada in order to reach Arcanis. The Crown Prince of Zemaria chose to do this to avoid the patrol of Kurzen, Saldivar, and Arcanis. They usually roam in the south and southeast of Zemaria where they would likely expect their troops will come from.
By doing this, the water and earth mages could enter the river that lies between Vrenada and Kurzen. They will be in disguise and pretend to be the human slaves of Vrenada and are sent by King Stephan to help in the preparation on the night of the blood moon.
"Marina! What are you doing here?" Elsa exclaimed spotting the mermaid on the ship's main deck. She was surrounded by her mages and other people who boarded their ship.