The Sworn Sword

He broke Lord Arryn's van to pieces and slew the Knight of Ninestars and Wild Wyl Waynwood before coming up against Ser Gwayne Corbray of the Kingsguard. For near an hour they danced together on their horses, wheeling and circling and slashing as men died all around them. It's said that whenever Blackfyre and Lady Forlorn clashed, you could hear the sound for a league around. It was half a song and half a scream, they say. But when at last the Lady faltered, Blackfyre clove through Ser Gwayne's helm and left him blind and bleeding.

Daemon dismounted to see that his fallen foe was not trampled, and commanded Redtusk to carry him back to the maesters in the rear. And there was his mortal error, for the Raven's Teeth had gained the top of Weeping Ridge, and Bloodraven saw his half brother's royal standard three hundred yards away, and Daemon and his sons beneath it. He slew Aegon first, the elder of the twins, for he knew that Daemon would never leave the boy whilst warmth lingered in his body, though white shafts fell like rain. Nor did he, though seven arrows pierced him, driven as much by sorcery as by Bloodraven's bow. Young Aemon took up Blackfyre when the blade slipped from his dying father's fingers, so Bloodraven slew him, too, the younger of the twins. Thus perished the black dragon and his sons.

""There was much and more afterward, I know. I saw a bit of it myself… the rebels running, Bittersteel turning the rout and leading his mad charge… his battle with Bloodraven, second only to the one Daemon fought with Gwayne Corbray… Prince Baelor's hammerblow against the rebel rear, the Dornishmen all screaming as they filled the air with spears… but at the end of the day, it made no matter.

The war was done when Daemon died."

"""So close a thing… if Daemon had ridden over Gwayne Corbray and left him to his fate, he might have broken Maekar's left before Bloodraven could take the ridge. The day would have belonged to the black dragons then, with the Hand slain and the road to King's Landing open before them.

Daemon might have been sitting on the Iron Throne by the time Prince Baelor could come up with his stormlords and his Dornishmen.

""The singers can go on about their hammer and their anvil, ser, but it was the kinslayer who turned the tide with a white arrow and a black spell. He rules us now as well, make no mistake. King Aerys is his creature. It would not surprise to learn that Bloodraven had ensorceled His Grace, to bend him to his will.