Brightroar - The ancestral sword of House Lannister, carried to Valyria and lost by Tommen II Lannister, King of the Rock.Blackfyre - An ancestral sword of House Targaryen, wielded by Aegon the Conqueror and Daemon Blackfyre.

The blacksmiths of Qohor claim to know how to reforge Valyrian steel, and Tobho Mott did reforge Ice at the request of the Lannisters, in King's Landing.

Only the greatest weaponsmiths can reforge swords from existing Valyrian steel, but the secret of creating such an alloy was apparently lost with Valyria, making those remaining weapons highly treasured and extremely rare. It is likely that most of the Valyrian steel swords were brought to Westeros by the Targaryens, after the Doom of Valyria. Most Valyrian steel blades in Westeros are treasured heirlooms of noble houses, each with its own name and storied history. Valyrian steel blades are lighter, stronger, and sharper than even the best castle-forged steel, and feature distinctive rippled patterns similar to Damascus steel the mark of steel that has been folded back on itself many thousands of times. It is the spells and magic that make the steel special.

Valyrian steel is a magical alloy invented in Valyria and used to make weapons of unparalleled quality.

Ck2 agot valyrian sword