Robert Eggers reportedly listened to a lot of metal while making The Northman. It shows. Where the prodigiously talented New Hampshire director has previously wrought tension from claustrophobic confinement – within the dense forest of darkly delicious 2015 chiller The Witch, and the titular phallic beacon of 2019’s delirious psychological horror The Lighthouse – his astonishing third outing is a Viking-centric explosion of violence and vengeance, with the carnage strewn outrageously across medieval Northern Europe. Working with Icelandic poet Sjón, Eggers delves into the Old Norse legend of Amleth, a young prince obsessed with revenge on the uncle who murdered his father and took his widowed mother as wife. Where that source material once inspired Shakespeare’s Hamlet,...