She had a Valyrian STEEL sword
she called Dark Sister.
Game of Thrones Season 2, Episode 7
16 centimetres of STEEL.
Money Heist Season 1, Episode 8
Good STEEL is always needed on the Wall.
Game of Thrones Season 2, Episode 2
Valyrian STEEL.
Game of Thrones Season 1, Episode 3
Bless him with STEEL.
Game of Thrones Season 6, Episode 5