For the reason that demonstrate’s pretty first episode. They destroy Guys and bears and perhaps dragons and switch them into ice zombies that join the ranks in their army. But it’s in no way been very clear exactly what the White Walkers, or their leader the Night King, essentially https://liantong.com.tw/%e6%a1%83%e5%9c%92%e6%b1%bd%e8%bb%8a%e8%b2%b8%e6%ac%be%e8%bc%95%e9%ac%86%e6%90%9e%e5%ae%9a%ef%bc%9a%e8%81%af%e9%80%9a%e8%b2%b8%e8%a7%a3%e7%ad%94%e5%b8%b8%e8%a6%8b%e5%95%8f%e9%a1%8c/