He drove a DAGGER into the Walker's heart.
Game of Thrones Season 6, Episode 6
When the Knight of the Flowers unseated him,
I lost this DAGGER.
Game of Thrones Season 1, Episode 3
Do you know whose DAGGER this is?
Game of Thrones Season 1, Episode 3
Did you bring the DAGGER with you,
by any chance?
Game of Thrones Season 1, Episode 3
With a DAGGER made of dragonglass.
Game of Thrones Season 5, Episode 5