The party's planned morning objective, where Samantha's new ability to retrieve people may provide a decisive infiltration weapon.
Carl explains that the party cannot abandon the increasingly dangerous Samantha because they plan to use her against the naiad castle in the morning. Her proven ability to return through the xistera while carrying another person makes her more valuable than the original plan anticipated.
The castle is not visible in the chapter; it is associated with the naiad-controlled river region.
The castle is the next tactical objective keeping Samantha inside the party despite mounting warning signs.