House Grimborn is the family that dragon hunters Ryker andViggo Grimborn belonged to.
History[]
Both Ryker and Viggo Grimborn acted as enemies towards the Dragon Riders. Viggo was the leader of the Dragon Hunters until Ryker betrayed Viggo in "Shell Shocked, Part 1" and stole the Shellfire. Viggo then aided the Dragon Riders to defeat his brother and kill him. He then captured Astrid and offered an exchange for the Dragon Eye, which Hiccup threw into the volcano on Dragon's Edge. Viggo was thought to be smarter than Hiccup as mentioned by the Tuffnut.
Viggo helped the Dragon Riders defeat Ryker, and was assumed dead at the end of "Shell Shocked, Part 2" until he joined Krogan and Johann in "Return of Thor Bonecrusher". When Johann dropped a cave on him, a Monstrous Nightmare saved him, changing his view of dragons. He sacrificed himself to save Hiccup in "Triple Cross" when his plan to steal the Dragon Eye from Johann and Krogan failed. This rendered the Grimborn family extinct.
Weapons: Inferno, Astrid Hofferson's Axe, Hiccup's Viking Helmet, Hiccup's Shield, The Mangler (Hiccup's Bola Catapult), Dragon Root Arrows, Toothless' Saddle and Tail Fin, Dragon Scale Armor, Deathgripper Venom
Plants: Dragon Root, Blue Oleanders, Purple Oleanders Other: Yak Nog, Bork's Papers, The Book of Dragons (original, The Nine Realms), Hiccup's Prosthetic Leg, Astrid's Betrothal Necklace, Gobber's Peg Leg