While Grimmel was visiting the Warlords inside their dragon fighting arena, a Rumblehorn broke its chains and began rampaging. The hunter quickly grabbed his crossbow and shoot at the wild dragon, making it collapse in an instant.
During the concomitant events of "The Hidden World" Expansion Pack, Grimmel used his crossbow to shoot down Cloudjumper and inject the dragon with Deathgripper venom. He also used his crossbow while fighting the Dragon Riders in the "Dragon Tactics" mini-game.
Grimmel's crossbow is an ordinary crossbow, with wooden structures combined with metal ones.
- Projectile launching: Grimmel uses his crossbow in order to lauch arrows which contain Deathgripper venom. The crossbow is extremely powerful, as Grimmel managed to shoot down Toothless, who was flying at full speed, while riding the Unnamed Light Fury.