A pact of ice and fire

Write a long, richly detailed story set in the world of A Song of Ice and Fire, during the era of A Knight of the Seven Kingdoms (around the time of King Daeron II’s reign). The dragons are long gone, and House Targaryen has lost much of its former glory. They cling to power through political marriages, fragile alliances, and the lingering weight of Aegon’s Prophecy—the dream of the coming darkness that only the blood of the dragon can face. The prophecy is not forgotten by the royal family, especially by Prince Valarr Targaryen.