

It was previously in the possession of Lord Randyll Tarly, and was later stolen by his son, Samwell. The two-handed greatsword has been in the Tarly family for over 500 years. Heartsbane is the ancestral Valyrian steel sword of House Tarly. The last known owner of the sword was one of Aegon IV's great bastards, Brynden Rivers (a/k/a Bloodraven and a/k/a the Three-Eyed Raven). The sword was also wielded by the famed Prince Aemon the Dragonknight. It was wielded by Visenya, sister wife to Aegon I. The second of the two Valyrian steel blades owned by House Targaryen. Tywin Lannister has tried to purchase swords from minor houses, but these poor houses are loathe to part with their heirlooms. As such House Lannister has been without a Valyrian steel blade for centuries, much to the chagrin of Tywin Lannister the current patriarch.

It was lost when Tommen II, King of the Rock, sailed to Valyria and failed to return. The ancestral Valyrian Greatsword of House Lannister. Daemon took the name Blackfyre as his surname and led the Blackfyre Rebellion against House Targaryen.

This matter was further complicated by Aegon IV legitimizing all his bastards on his death bed. This was seen by many to be Aegon's recognition of Daemon as his son and his intention for Daemon to succeed him instead of his trueborn heir Daeron. It was passed down to the heirs apparent throughout the years until Aegon IV (The Unworthy) gave the sword to his bastard son Daemon after he had demonstrated great prowess in battle. This sword was wielded by Aegon I during the wars of conquest. One of the two Valyrian steel blades belonging to House Targaryen. Only a handful of such swords still exist to this day. Nothing holds quite the edge like Valyrian steel. They are exquisite weapons, crafted using forgotten enchantments to produce the very best quality weapons. The very best blades, Valyrian Blades, are relics of Old Valyria.
