After Aegon landed on Westeros and began his conquest, Visenya flew Vhagar to Stokeworth, where crossbowmen loosed bolts until the dragon set the roofs of the castle keep ablaze.伊耿·坦格利安一世派戴蒙·瓦列利安指挥他的舰队去拿下海鸥镇。王后维桑尼亚·坦格利安骑乘瓦格哈尔同戴蒙及其舰队一同前往。在海鸥镇之战中，艾林家族舰队击败了坦格利安家族舰队，戴蒙·瓦列利安也在此时丧生。维桑尼亚王后逆转了局势，骑着瓦格哈尔将幸存的艾林家族船只焚毁。这一仗的失利，使得三姐妹群岛脱离了艾林家族的势力；另外，由于舰队几乎全灭，艾林家族再也无法在海上与坦格利安向对抗。
Visenya then flew to Crackclaw Point with Vhagar, to accept many pledges of fealty from the local lords.维桑尼亚王后飞往石堂镇与其他坦格利安大军取得联系，再一同向南进军。在怒火燎原的战场上，有史以来唯一一次三头坦格利安巨龙一起投入战斗。瓦格哈尔与贝勒里恩和米拉西斯一起焚烧敌人，杀死了河湾王孟恩九世和四千名士兵，并毁灭了他的园丁家族。抵抗坦格利安家族的凯岩-河湾联军瓦解，征服者伊耿取得胜利，其后西境和河湾地都向他投诚。
Visenya next flew Vhagar to the Trident in the riverlands, where she met with her brother and sister and their dragons, to face King in the North Torrhen Stark. Brandon Snow, the bastard brother of Torrhen, offered to sneak into the Targaryen camp at night to slay the dragons, but the northern king refused the attempt, and instead sent his brother as an envoy, eventually bending the knee to the Targaryens.
First Dornish War
Following the deaths of Rhaenys and Meraxes in 10AC at Hellholt in Dorne, Visenya and Aegon burned every Dornish stronghold at least once (except Sunspear and its shadow city) during a two-year period known as the Dragon's Wroth. The Dornish tell a tale that the Targaryens refused to attack Sunspear because they were afraid that Princess Meria Martell had purchased a device from Lys to slay Vhagar and Balerion, but Archmaester Timotty suggests the Targaryens intended to turn the other Dornish houses against the Martells.
Aenys I and Maegor I
When King Aegon I died in 37AC, Vhagar supplied the flames to light the fire of his funeral pyre. In 41AC, when King Aenys I Targaryen named his eldest son and heir, Prince Aegon, the Prince of Dragonstone at his wedding, Visenya angrily left for Dragonstone. It was said that the moon turned as red as blood when Vhagar passed it.
Later that year, when King Aenys arrived at Dragonstone, fleeing the first rebels in the Faith Militant uprising, Visenya asked him to grant her to leave to take Vhagar and burn the Starry Sept in Oldtown. Aenys refused. When the king died early in 42AC, Visenya left Dragonstone within an hour of his death, and flew to Pentos, where her son Maegor lived in exile. After Maegor had claimed the crown on Dragonstone, Visenya accompanied him upon Vhagar and crossed Blackwater Bay to King's Landing. The return of both Vhagar and Balerion to King's Landing set off riots in the city.
Prior to Maegor's wedding to Tyanna of the Tower, Visenya flew upon Vhagar to Driftmark to convince Alyssa Velaryon to appear at the wedding. When the Faith Militant continued to resist Maegor's reign, even after the losses they suffered at the Battle of Stonebridge and the Battle at the Great Fork of the Blackwater, Visenya mounted Vhagar and burned the seats of House Blanetree, House Terrick, House Deddings, House Lychester, and House Wayn in the Reach within a single night. Maegor flew Balerion to the westerlands, burning the seats of House Broom, House Doggett, House Falwell, House Lorch, House Myatt, and other "pious lords" who had defied his royal summons.
In 43AC, Maegor and Visenya turned towards Oldtown, threatening to incinerate the Starry Sept in response to the High Septon's condemnation of his polygamous marriages. Only the mysterious death of the High Septon, which allowed Lord Martyn Hightower to open his gates before Balerion and Vhagar, saved the city from dragonflame.
Reign of Jaehaerys
Vhagar remained unridden for twenty-nine years after Visenya's death, spending much of that time on Dragonstone and later taking residence in the Dragonpit in King's Landing. It was in 73AC that Prince Baelon the Brave after achieving knighthood, set out to follow his brother Prince Aemon and become a dragonrider claiming Vhagar. Vhagar along with Caraxes and Vermithor burned the Dornish fleet that attempted to invade the Stormlands during the Fourth Dornish War in 83AC.在贝勒里恩老死于94AC后，瓦格哈尔就成了曾在征服战争效力过的三条巨龙的仅存。 Vhagar became riderless again, when Prince Baelon passed away in 101AC.
瓦格哈尔的头骨曾与其他十八条龙的头骨一起悬挂于王座厅的墙上。篡夺者战争后，劳勃·拜拉席恩将它们搬到阴湿地窖内收藏。In 284AC, when Tyrion Lannister visited the capital for the wedding of his sister Cersei to Robert, he observed the skulls in the cellar, including Vhagar's. In 298AC, Arya Stark encountered the dragon skulls while passing through the Red Keep cellars.
- 列王的纷争，章节 12，丹妮莉丝。
- 血与火，the long reign- jaehaerys & alysanne:policy, progeny, and pain。
- 权力的游戏，章节 13，提利昂。
- 冰雨的风暴，章节 57，丹妮莉丝。
- 冰与火之歌的世界，dorne: dorne against the dragons。
- Earlier prints of The World of Ice & Fire erroneously state that this event and the death of the High Septon took place in 44AC. The Sons of the Dragon gives the correct date of 43AC. Septon Pater, the High Septon elected as a replacement, died a year later.
- 冰与火之歌的世界，the reach: oldtown。
- 冰与火之歌的世界，the targaryen kings: maegor i。
- 魔龙的狂舞，章节 8，提利昂。
- 权力的游戏，章节 3，丹妮莉丝。
- 权力的游戏，章节 12，艾德。
- 权力的游戏，章节 32，艾莉亚。
- 权力的游戏，章节 50，艾莉亚。