From A Wiki of Ice and Fire
Lamentation was a famed Valyrian steel sword which belonged to House Royce.
Ser Willam Royce wielded the blade during the Dance of the Dragons. The sword was torn from the hand of Willam, however, when he was killed during the Ride of the Seven. With Willam's death, the sword was carried off, never to be found again. However, some rumors claim that Ser Warrick Wheaton slashed a wing off of Syrax with a Valyrian steel sword, likely Lamentation, during the Storming of the Dragonpit.
- ↑ 1.0 1.1 1.2 Fire & Blood, The Dying of the Dragons - Rhaenyra Overthrown.
- ↑ 2.0 2.1 The World of Ice & Fire, The Targaryen Kings: Aegon II.