In the game of thrones, you win or you die - except when you're turned into a White Walker, which is kind of a mash-up of both. Given the size of the horde that's amassed under the Night King's rule over the past seven seasons, it's amazing to know how much detail goes into making the creatures a reality. One of the most iconic Walkers of the series recently shared just how much preparation goes into becoming the undead on Game of Thrones. Hint: It's more than you think.