Movie where vikings only came once a time to cure peoples illnes

A Muslim ambassador exiled from his homeland joins a group of Vikings, initially offended by their behavior but growing to respect them. As they travel together, they learn of a legendary evil closing in and must unite to confront this formidable force.

British war documentary

During a flight to Örebro, two childhood friends crash but survive. At the hospital, Karl-Johan experiences fever dreams where he lives in the Viking age.

For eight years, a team of specialists created a whole world about which almost nothing was known. The world of Kievan Rus of the tenth century. They managed to make historical films with documentary accuracy. Icelandic sagas and the works of Oriental travelers, Byzantine books and, of course, ancient Russian chronicles were studied and researched. The oldest dated chronicle is kept in the Russian National Library in St. Petersburg. It was these texts that formed the basis of the script. Five built cities, hand—sewn costumes, forged weapons, a Viking ship — a drakkar — built according to the drawings of that time, complex computer graphics - all in order for the viewer to fully immerse himself in the atmosphere of the early Middle Ages of the Viking film.

Einar, brutal son of Ragnar and future heir to his throne, tangles with Eric, a wily slave, for the hand of a beautiful English maiden.