On Dragonstone, Queen Rhaenyra collapsed when told of Luke's death. Luke's young brother Joffrey (Jace was still away on his mission north) swore a terrible oath of vengeance against Prince Aemond and Lord Borros. Only the intervention of the Sea Snake and Princess Rhaenys kept the boy from mounting his own dragon at once. As the black council sat to consider how to strike back, a raven arrived from Harrenhal. "An eye for an eye, a son for a son," Prince Daemon wrote. "Lucerys shall be avenged."
In his youth, Daemon Targaryen's face and laugh were familiar to every cut-purse, whore, and gambler in Flea Bottom. The prince still had friends in the low places of King's Landing, and followers amongst the gold cloaks. Unbeknownest to King Aegon, the Hand, or the Queen Dowager, he had allies at court as well, even on the green council… and one other go-between, a special friend he trusted utterly, who knew the wine sinks and rat pits that festered in the shadow of the Red Keep as well as Daemon himself once had, and moved easily through the shadows of the city. To this pale stranger he reached out now, by secret ways, to set a terrible vengeance into motion.
Amidst the stews of Flea Bottom, Prince Daemon's go-between found suitable instruments. One had been a serjeant in the City Watch; big and brutal, he had lost his gold cloak for beating a whore to death whilst in a drunken rage. The other was a rat-catcher in the Red Keep. Their true names are lost to history. They are remembered as Blood and Cheese.
The hidden doors and secret tunnels that Maegor the Cruel had built were as familiar to the rat-catcher as to the rats he hunted. Using a forgotten passageway, Cheese led Blood into the heart of the castle, unseen by any guard. Some say their quarry was the king himself, but Aegon was accompanied by the Kingsguard wherever he went, and even Cheese knew of no way in and out of Maegor's Holdfast save over the drawbridge that spanned the dry moat and its formidable iron spikes.
The Tower of the Hand was less secure. The two men crept up through the walls, bypassing the spearmen posted at the tower doors. Ser Otto's rooms were of no interest to them. Instead they slipped into his daughter's chambers, one floor below. Queen Alicent had taken up residence there after the death of King Viserys, when her son Aegon moved into Maegor's Holdfast with his own queen. Once inside, Cheese bound and gagged the Dowager Queen whilst Blood strangled her bedmaid. Then they settled down to wait, for they knew it was the custom of Queen Helaena to bring her children to see their grandmother every evening before bed.
Blind to her danger, the queen appeared as dusk was settling over the castle, accompanied by her three children. Jaehaerys and Jaehaera were six, Maelor two. As they entered the apartments, Helaena was holding his little hand and calling out her mother's name. Blood barred the door and slew the queen's guardsman, whilst Cheese appeared to snatch up Maelor. "Scream and you all die," Blood told Her Grace. Queen Helaena kept her calm, it is said. "Who are you?" she demanded of the two. "Debt collectors," said Cheese. "An eye for an eye, a son for a son. We only want the one, t' square things. Won't hurt the rest o' you fine folks, not one lil' hair. Which one you want t' lose, Your Grace?"
Once she realized what he meant, Queen Helaena pleaded with the men to kill her instead. "A wife's not a son," said Blood. "It has to be a boy." Cheese warned the queen to make a choice soon, before Blood grew bored and raped her little girl. "Pick," he said, "or we kill them all." On her knees, weeping, Helaena named her youngest, Maelor. Perhaps she thought the boy was too young to understand, or perhaps it was because the older boy, Jaehaerys, was King Aegon's firstborn son and heir, next in line to the Iron Throne. "You hear that, little boy?" Cheese whispered to Maelor. "Your momma wants you dead." Then he gave Blood a grin, and the hulking swordsman slew Prince Jaehaerys, striking off the boy's head with a single blow. The queen began to scream.
Strange to say, the rat-catcher and the butcher were true to their word. They did no further harm to Queen Helaena or her surviving children, but rather fled with the prince's head in hand.
Though Blood and Cheese had spared her life, Queen Helaena cannot be said to have survived that fateful dusk. Afterward she would not eat, nor bathe, nor leave her chambers, and she could no longer stand to look upon her son Maelor, knowing that she had named him to die. The king had no recourse but to take the boy from her and give him over to his mother, the Dowager Queen Alicent, to raise as if he were her own. Aegon and his wife slept separately thereafter, and Queen Helaena sank deeper and deeper into madness, whilst the king raged, and drank, and raged.
Now the bloodletting began in earnest.
The fall of Harrenhal to Prince Daemon came as a great shock to His Grace. Until that moment, Aegon II had believed his half sister's cause to be hopeless. Harrenhal left His Grace feeling vulnerable for the first time. Subsequent rapid defeats at the Burning Mill and Stone Hedge came as further blows, and made the king realize that his situation was more perilous than it had seemed. These fears deepened as ravens returned from the Reach, where the greens had believed themselves strongest. House Hightower and Oldtown were solidly behind King Aegon, and His Grace had the Arbor too… but elsewhere in the south, other lords were declaring for Rhaenyra, amongst them Lord Costayne of Three Towers, Lord Mullendore of Uplands, Lord Tarly of Horn Hill, Lord Rowan of Golden-grove, and Lord Grimm of Greyshield.
Other blows followed: the Vale, White Harbor, Winterfell. The Blackwoods and the other river lords streamed toward Harrenhal and Prince Daemon's banners. The Sea Snake's fleets closed Blackwater Bay, and every morning King Aegon had merchants whining at him. His Grace had no answer for their complaints, beyond another cup of strongwine. "Do something," he demanded of Ser Otto. The Hand assured him that something was being done; he had hatched a plan to break the Velaryon blockade. One of the chief pillars of support for Rhaenyra's claim was her consort, yet Prince Daemon represented one of her greatest weaknesses as well. The prince had made more foes than friends during the course of his adventures. Ser Otto Hightower, who had been amongst the first of those foes, was reaching across the narrow sea to another of the prince's enemies, the Kingdom of the Three Daughters, hoping to persuade them to move against the Sea Snake.
The delay did not sit well with the young king. Aegon II had run short of patience with his grandfather's prevarications.
Though his mother the Dowager Queen Alicent spoke up in Ser Otto's defense, His Grace turned a deaf ear to her pleading. Summoning Ser Otto to the throne room, he tore the chain of office from his neck and tossed it to Ser Criston Cole. "My new Hand is a steel fist," he boasted. "We are done with writing letters." Ser Criston wasted no time in proving his mettle. "It is not for you to plead for support from your lords, like a beggar pleading for alms," he told Aegon. "You are the lawful king of Westeros, and those who deny it are traitors. It is past time they learned the price of treason."