A century after the Doom of Valyria, and three hundred years
before the present day, the Targaryen host landed upon Westeros,
with Aegon the Conqueror, his sisters Visenya and Rhaenys, and
their dragons at its head. The dragons were named for the old
gods of Valyria—Balerion the Black Dread, whose teeth were long
as swords, and his sisters Meraxes and Vhagar.