
Valyrian STEEL.
Game of Thrones Season 1, Episode 3

No guards.
The warlocks kill with sorcery, not STEEL.
Game of Thrones Season 2, Episode 10

And proper STEEL.
Game of Thrones Season 3, Episode 9

We can't make STEEL as good as yours,
it's true, but...
Game of Thrones Season 2, Episode 7

One of only two Valyrian STEEL swords
in the capital, Your Grace,
Game of Thrones Season 4, Episode 2