At an unknown time, this Boneknapper was found and captured by Arngrim Dammen of the Northlander Tribe. Along with a Timberjack he had also caught, he chained up the Boneknapper and used it to help show off to other tribes and aid in his dragon egg trade.
After Arngrim stole Stormfly to use for his auction, Hiccup, Astrid, Gobber, and the other Dragon Riders of Berk sailed to the Northlands to rescue her. While there, they discovered Dammen's auction and the two dragons he had chained up. Using Toothless' fire, Hiccup was able to free both the Boneknapper and the Timberjack, who proceeded to chase after and breathe fire at the Northlanders, causing them to flee. The Boneknapper then joined the Dragon Riders and the Timberjack in cornering Dammen, forcing him to surrender.