Because the clearly show’s extremely 1st episode. They kill Gentlemen and bears and also dragons and switch them into ice zombies that be part of the ranks in their army. Nonetheless it’s in no way been obvious exactly what the White Walkers, or their chief the Night time King, https://liantong.com.tw/%e6%a1%83%e5%9c%92%e6%88%bf%e5%b1%8b%e4%ba%8c%e8%83%8e%e8%b2%b8%e6%ac%be%e7%94%b3%e8%ab%8b%e6%b5%81%e7%a8%8b%e8%88%87%e5%b8%b8%e8%a6%8b%e5%95%8f%e9%a1%8c/