Last month, it was revealed that Michiel Huisman had been added to the cast of season four of Game of Thrones as a replacement for Ed Skrein's Daario Naharis. Well, now another replacement has occurred for a character who has already been portrayed by two different actors (Conan Stevens and Ian Whyte) and was completely left out of the third season. Icelandic actor Hafthor Julius Bjornsson has revealed that he will play the ruthless villain when the critically acclaimed series returns next year.What do you guys think of this casting decision?