The Last Storm was a major battle in the War of Conquest. Aegon the Conqueror sent his commander Orys Baratheon, rumored to be his bastard half-brother, to conquer the Stormlands. The Stormlands were under the control of Argilac the Arrogant of House Durrandon, the Storm King. Even though the massive walls of Storm's End provided protection against Baratheon's siege, Argilac decided to meet the invading armies in open battle after hearing about how Aegon Targaryen's dragon Balerion destroyed Harrenhal. Orys Baratheon and the Targaryen army were victorious and Argilac was killed.