The fort is seen next when Grimmel is extracting venom from his dragons to make more darts in one of the open spaces just as Hiccup and the other Dragon Riders raid the fort in an effort to take him out. A battle breaks out and the stone tower is knocked over when the Rescued Crimson Goregutter crashes into it to avenge its rescuers. Ruffnut Thorston is accidentally left behind when the riders leave.
Inside the ruined tower, Grimmel and the Warlords scheme their next move, while Ruffnut is kept in a dragon cage. She is eventually let go with a Scuttleclaw that was being housed in a cage next to her, which Grimmel hoped to track her to New Berk to find where the Berkians had settled as their new home.