House Blackfyre

House Blackfyre was a cadet branch of House Targaryen, founded by Daemon Blackfyre, a bastard son of King Aegon IV Targaryen, following his legitimisation in 184 AC. Daemon I Targaryen was also granted the Valyrian steel sword of Blackfyre, for which he named his House.

Starting in 196 AC with the First Blackfyre Rebellion, Daemon Blackfyre and his descendants would attempt to claim the Iron Throne from House Targaryen (and later the New Throne from House Baratheon) a total of six times, failing on each occasion.

House Blackfyre met it's end in 310 AC during the War of the Narrow Sea; they're sixth and ultimately final attempt to take the Seven Kingdoms. After Aeron Blackfyre was killed during the Battle of Storm's End and their invasion into the Stormlands and Crownlands stalled, House Blackfyre's allies, the Second Triarchy and Euron Greyjoy, turned on the sole surviving Blackfyre, Naerys Blackfyre, selling her out to Lord Edric Baratheon in order to buy time to withdraw. Naerys was soon after executed by Edric using Blackfyre itself, bringing a final end to the House, 126 years after it's creation.

House Blackfyre's sigil is a black three-headed dragon on a red field, a reversal of the Targaryen heraldry.