How many brothers can say that
they've killed a White Walker and a Thenn?
Game of Thrones Season 5, Episode 1
(WHITE WALKER SNARLING)
Game of Thrones Season 6, Episode 5
When you killed the White Walker,
Game of Thrones Season 7, Episode 6
how in seven hells
did you manage to kill a White Walker?
Game of Thrones Season 4, Episode 9
It's what I used to kill the White Walker.
Game of Thrones Season 5, Episode 7