Arngrim Dammen

Arngrim Dammen is a character from the Riders of Berk comic. He is introduced in the third volume, The Ice Castle.

Background
Arngrim is native to the north from a tribe called the Northlanders. He is a trader, selling very valuable items, and is shown to go to devious mean to get what he wants.

The Ice Castle
Arngrim first appeared sailing towards Berk, and catching site of the Dragon Riders. After aquantingng himself with the villagers, Arngrim offers to sell some of his furs to them. Much softer and warmer than the ones they have, everyone takes a liking to the trader; except Gobber, who had a run-in with Northlanders in the past. Arngrim takes an interest in the dragons, especially Stormfly, which makes Astrid suspicious of him.

Later that night, after the Vikings with his tales, Arngrim lures Stormfly to his ship and captures her. He soon makes his escape. He sails to the Ice Needles, a large glacier fortress, to carry out his main goal.

The Dragon Riders manage to track Arngrim down and discover he plans to sell dragon eggs to his buyers, thinking they will be able to control them from an early age. Hiccup and Toothless fly in to the demenstationn showing while dragon can be trained, they cannot be tamed, releasing the Boneknapper and Timberjack he had in chains. However, one of Toothless' blasts incubates a Whispering Death egg, thus allowing it to hatch. After Hiccup trains the hatchling and Astrid gets Stormfly back, the VIkings corner Arngrim and is forced to surrender.

Trivia

 * Arngrim Dammen is the first antagonist to only be introduced in the comics.
 * Dammen is the second trader seen in the franchise.
 * Instead of a helmet, Dammen wears a skull on his head. As a trader, he wore a fur hat stocking.
 * Dammen appears to be able to estimate a dragon's age, guessing Stormfly was a two-year-old.
 * Among other eggs Dammen also had were Nadders, Thunderdrums, Monstrous Nightmares, and even Snaptrappers.