Cold-rolled STEEL.
Game of Thrones Season 4, Episode 7
The substance burns so hot,
it melts wood, stone, even STEEL,
Game of Thrones Season 2, Episode 5
Should have known to come
straight to the Street of Steel.
Game of Thrones Season 7, Episode 5
The Dornishman's blade
It was made of black STEEL
Game of Thrones Season 5, Episode 6
Why would a cutthroat
have a Valyrian STEEL dagger?
Game of Thrones Season 7, Episode 4