House Durrandon, the Storm Kings

"House Durrandon, The Storm Kings" is the fourth chapter of Conquest & Rebellion: An Animated History of the Seven Kingdoms, a special feature from Game of Thrones: The Complete Seventh Season. It is narrated by Conleth Hill as Varys.

Plot
Varys describes "The Last Storm," the epic battle waged between Aegon's ally Orys Baratheon, and Argilac "the Arrogant," King of the Stormlands.