Game Of thrones

You walk out winterville then you walk in forest in the middle of night you seen a Shadow Person standing there in the minute the Person run towards you Now you seen the Person is White walker But then The White walker Run towards you

then Seen Someone kill White walker in font you he look at you Without Talk or Saying he Tall 8ft wearing Lannister Full Armor knight he Doesn't say anything then he walk away then you know Who is he..his Name Ser Gregor clegan