Dragons: Riders of Berk Season 7 Episode 13 - Sins of the Past Episode Title:Sins of the Past.Episode Description:Heather and Johann travel to the Northern Markets when the latter finds word of a man who has claimed to have seen Oswald the Agreeable alive. This, however, turns out to be a trap by Krogan and the Hunters, who capture Windshear and demand the gem on Heather's belt, a lens for the Dragon Eye, in exchange for her life. Johann convinces Heather to go through with the trade and though Krogan attempts to double cross her with a fake key, they are saved by Hiccup, the Riders, and Dagur, who finally reveals the truth of Oswald's fate and grants her closure. Meanwhile, Krogan and Viggo obtain the lens setting the true mastermind behind the Hunters one step closer to finding the King of Dragons.