Zack Sharf In case the first trailer for Robert Eggers’ 10th century viking epic “The Northman” didn’t make it clear enough, Alexander Skarsgard has undergone one serious transformation to play a prince seeking revenge for the murder of his father. Skarsgard is known for his muscular physique, but he’s taken things to a new level with his hulking beast of an appearance in “The Northman.” According to Eggers, the actor “transformed his body more wildly” for “The Northman” than he did to play Tarzan in the 2016 adventure movie “The Legend of Tarzan.”“I was utterly terrified, but it’s a major privilege to be able to do something like this,” Eggers recently told Total Film magazine about his new film.