Finally, we arrive at the myth about the hallucinogens. The first accounts of Vikings "going berserk" because they ate magic mushrooms was hypothesized in 1784 by a Christian priest named Odmann.

His character is a Viking berserker who's on a quest to avenge his father's murder. Skarsgård says getting into the film's battle scenes allowed him to draw on a side of himself he rarely accesses.