Trollhunters Fifteen-year-old James "Jim" Lake Jr and his friend Toby find a mystical amulet which grants him the Trollhunter mantle. He is shortly approached by his new troll mentors, Blinky and AAARRRGGHH!!!. Despite his initial reluctance of leading two difficult lives, he eventually accepts his role after discovering that neglecting the amulet will nevertheless lead to its return. During his visits to Heartstone Trollmarket, the presence of the first human Trollhunter stirs resentment, but he quickly gains their honor. Throughout his training and missions, he befriends a gnome (which Toby dubs "Gnome Chomsky") and discovers that goblins and Changelings (human-morphing trolls that replace humans to spy) are gathering for the completion of Killahead Bridge, which will be a portal for the Gumm-Gumms from the Darklands – the project is being lead by Bular, the son of the Gumm-Gumm's leader Gunmar, and the Changeling replacing Jim's high school teacher Mr. Strickler.