- "A foolish King of the Rock took House Lannister's Brightroar to Valyria, and neither blade nor man was seen again."
- ―Ser Jorah Mormont
Brightroar is a Valyrian steel blade that was the ancestral weapon of House Lannister. It was lost when Tommen II Lannister, King of the Rock, took it on his expedition to the ruins of Valyria and disappeared.
In the books
In the A Song of Ice and Fire novels, Brightroar was the ancestral Valyrian steel greatsword of House Lannister. House Lannister has been searching for a replacement ever since it was lost.
Tywin tried numerous times to buy one from impoverished noble houses but was always rebuffed, lords preferring to offer their daughters in marriage rather than part from such valuable heirlooms.
Tywin's youngest brother, Gerion, went into an expedition to the Valyrian Peninsula approximately in 291 AC, with the goal of finding Brightroar, and, like King Tommen II, never returned.