not for an average viewer this film calls for an educated audience Lots of negative reviews from aggrieved viewers complaining about plot details not making sense, about not understanding 'silly" scenes, for instance, the king father and son pretending to be farting salivating dogs, or scenes of black ravens cutting men's ropes, strange naked 'vikings' in wolf pelts, a few second appearance of the image of an old man in a wide-brimmed hat etcetera, again prove that large portion of the contemporary audience simply lack knowledge about Scandinavia mythology, lore, religious practices thus failing to recognize imagery and acts portrayed in the film.
Let's start with allusions to such fascinating elements of ancient Nordic culture as induced possession by a spirit of a totemic animal. Basically, a viewer of The Northman should approach this film well prepared in order to recognize and connect the original tales and visual rendering offered by the director.
The phenomenon of berserkers ( bear men), ulfhednars (wolf men) remain documented but little understood practice. With the advent and spread of Christianity in Scandinavia berserkers and ulfhednars become rejected by society and eventually last of them were hunted down. However, some outbursts of strange human illness labeled as Likania (personal delusion of being a dog or a wolf and subsequent behavior) were documented from the Middle ages up to 17-18th century Europe. Apparently, not only Scandinavian people but tribes of entire Germanic areal once practiced various techniques, often involving intoxication with mushrooms, or floral poisons, aimed to induce such "animal" possessions or states of mind. One can easily recognize in father-son scenes those dark tales from the past.
I also advise one to delve into mind-bending and blood-curling Nordic mythological tales of Ygdrasil tree of life and incarnations of God Odin, and of course of his daughter known as Valkyries, strikingly beautiful warrior-maidens riding invisibly among men killing each other in combat and picking worthy warriors to carry them to Valhalla.
One must try to understand how men of those distant times were emersed in those beliefs from early childhood and how terrifying it was for them to fail and lose passage into the afterlife. Many scenes and interactions of characters will suddenly stop being 'silly' and will start making sense.
One thing is for sure, this film is not for an average viewer. Also, if one is not into the medieval Scandinavian culture, the lack of references will prevent one from enjoying and recognizing many fine elements of it inserted and used by the director. This is where the director had failed. To many not-so-sophisticated viewers, this film will remain an enigma or a weird compilation of gory "pagan" scenes with obscure meaning.
I gave it 8 out of 10, but must say some scenes definitely deserve 10.