Dreamfyre was a slender she-dragon of pale blue and silver, hatched late in the reign of Aegon I and bonded in 32 AC to his nine-year-old granddaughter Rhaena Targaryen, who first rode her at twelve. She carried Rhaena through the worst years of House Targaryen: to exile on Fair Isle after Maegor killed her husband beneath the Gods Eye, back to the Red Keep when the usurper summoned her to be his bride, and away again in 48 AC with her daughter Aerea and the sword Blackfyre to join Jaehaerys. She had laid two clutches of eggs by 43 AC and another on Fair Isle, hatchlings Rhaena raised in the dragon yards of Dragonstone, and in 54 AC she carried her rider across all Westeros for more than a year in a fruitless search for the missing Aerea. Rhaena kept her at Harrenhal until her death in 73 AC, after which Dreamfyre lairs in the Dragonpit.
Under Viserys I she bonded with Princess Helaena, who rode her from the age of eleven and loved her, but after Helaena's little son was murdered the queen would not fly again. When Helaena threw herself from Maegor's Holdfast in 130 AC it is said Dreamfyre rose with a roar that shook the Dragonpit and snapped two of her chains. Weeks later the mob of King's Landing stormed the pit, and she alone of the four dragons within broke free, killing more men than the other three together, until a crossbow bolt took one of her eyes and, half-blind and maddened, she flew into the great dome. It cracked and half of it fell, and Dreamfyre died beneath the stone with the dragonslayers she had fought.