Fantasy became reality for “The Northman” stars Alexander Skarsgard and Anya Taylor-Joy. For years, the Stockholm-born Skarsgard dreamed of making a massive Viking movie exploring the epic Icelandic legends that have been passed down for centuries. The actor says his comprehensive research of Norse mythology led him to the “classic, hardcore revenge story” of Amleth, a warrior prince destined to kill his father’s murderer, no matter how much bloodshed is required along the way. “It’s in my DNA. I’m Swedish,” Skarsgard, 45, told the Daily News. “I was born 300 yards from a big runestone, so the…
