The Plot Of HBO's Rumored Game Of Thrones Spin-Off Series Explained

Aiding Aegon I Targaryen in his campaign to conquer most of Westeros were his wives (and sisters) Visenya and Rhaenys, as well as their three dragons: Balerion, Meraxes, and Vhagar. Fans of the "Game of Thrones" franchise have likely heard these names before. Balerion is already dead by the start of "House of the Dragon," but his gigantic skull serves as an important Targaryen monument. Meraxes is the most obscure of the three, referenced in a couple "Game of Thrones" episodes but never on-screen in any capacity. Vhagar, however, is alive as of "House of the Dragon," and becomes Aemond Targaryen's (Ewan Mitchell) dragon mount. Presumably, this upcoming series about Aegon's Conquest will tell the story of how each of these three dragons became legendary.

Notably, at the conclusion of Aegon's Conquest, the newly crowned king of six of Westeros' seven kingdoms commissions the iconic Iron Throne to be constructed out of swords stolen from his conquered foes. Notably, the southern kingdom of Dorne managed to resist being conquered, which will no doubt make for an intense storyline on the series.

The conclusion of Aegon's Conquest is even referred to as 1 AC and serves as something akin to the year 1 AD for the "Game of Thrones" universe. It's no surprise, then, that HBO plans on bringing this conflict to life given its pivotal role in the franchise's canon.