- "It wasn't just Aegon riding his dragon, it was Rhaenys and Visenya too...Rhaenys rode Meraxes, Visenya rode Vhagar."
- ―Arya Stark
Vhagar was the dragon ridden by Visenya Targaryen during the War of Conquest. Though smallest of the dragons, Vhagar was still large enough to swallow a horse whole, and its flames could melt armor.
While incarcerated and learning to read, Davos Seaworth had trouble reading Vhagar's name, even though he was able to read Visenya's with comparative ease. It must be said, however, that Visenya Targaryen is a very famous and important historical figure, while the name of her dragon might be less well-known to the uneducated.
In the BooksEdit
Vhagar was ridden by Aemond Targaryen during the Dance of the Dragons, the Targaryen civil war between Aegon II and Rhaenyra Targaryen. Aemond sided with his brother Aegon II. Vhagar was the greatest and most powerful living dragon during the Dance, by that time grown nearly as big as Balerion was during the War of Conquest, and she was one of the major advantages possessed by Aegon II's faction. In one of the opening moves of the war, Aemond rode Vhagar to attack and kill Rhaenyra's son Lucerys at Storm's End, while he was riding the young dragon Arrax - Vhagar killed both with little difficulty. Afterwards, Aemond used Vhagar to burn out vast swaths of the Riverlands, which had sided with Rhaenyra. Nonetheless, Vhagar was eventually killed during the Dance, in a great duel with the dragon Caraxes at Harrenhal.
After Meraxes and then Balerion died, Vhagar was the last of the original three Targaryen dragons. She therefore fought in more major Westerosi wars than any other Targaryen dragon: the War of Conquest, the Faith Militant uprising, and the Dance of the Dragons. Meraxes only fought in the War of Conquest. Balerion did fight in the Faith Militant uprising (ridden by Visenya's own son Maegor after Aegon died), but he died before the Dance of the Dragons - though Balerion did fight in previous wars outside of Westeros, such as the "Century of Blood" in the Free Cities.
- Vhagar at A Wiki of Ice and Fire (spoilers from the books)