Have you seen any white walkers?
One day at 03.00 AM, as you were trying to use your energy’s so that they don’t go waste, A level 50+ guy suddenly joins you alliance. You say “Hello, welcome to my alliance”. ----No reply’s . Some other prominent sleepless members of your alliance members, also says welcome. No reply.
He/She stays in your alliance till morning, and then leaves the alliance quietly.
If you have experienced this, You have probably seen a white walker. He/She has lost his/her soul to the game, in fact not alive. You suddenly feel winter is coming. You are almost 50.