A KNIFE perhaps, a good, sharp one,
Game of Thrones Season 1, Episode 2
because when the KNIFE go in
Game of Thrones Season 5, Episode 5
Drop the KNIFE!
Game of Thrones Season 1, Episode 6
take a KNIFE and cut your wrists.
Game of Thrones Season 6, Episode 7
You'll show him the KNIFE you used
Game of Thrones Season 6, Episode 6