HBO Introduced A Permanent Change To A Song Of Ice And Fire Lore

Published Jul 9, 2026, 7:15 PM EDT

It's not just that there have been two major TV spinoffs, House of the Dragon and A Knight of the Seven Kingdoms; Martin has written several supplemental stories since 2011, including Fire & Blood, The World of Ice and Fire, and other lore-heavy texts. None of those mention what Viserys I (Paddy Considine) tells Rhaenyra (Milly Alcock) at the end of the HOTD premiere.

At the end of the episode, Viserys tells his daughter about a prophecy, passed down from Targaryen ruler to Targaryen ruler. It's called "the song of ice and fire" and it's a prophecy that the White Walkers will return and a Great War will begin, led by the prince that was promised.

Now on its own, the song of ice and fire is not new to the canon; what is new is the reveal that Aegon the Conqueror was the Targaryen who had the prophecy. Until that moment, it was unclear where the prophecy had come from, but this comment has effectively changed a major piece of Game of Thrones lore, likely permanently.

As Far As Anyone Is Concerned, The Lore Update In House Of The Dragon Is Canon

Some fans may be wondering if this piece of lore, that Aegon I is the progenitor of a prophecy that affects the series up until the last season of the show, is permanent or not. While George R.R. Martin may not have the greatest relationship with Ryan Condal and House of the Dragon, he's still an executive producer, and that lore change likely wouldn't be present without his approval.

So HBO's addendum can be confirmed as much as anything can in A Song of Ice and Fire. As Martin's stories sit unfinished and because there are still so many mysteries left unexplained, there's not much canonical conflict that can really occur. Before House of the Dragon, there was no source for the "song of ice and fire", so anything could theoretically be the source, including Aegon the Conqueror.

It's possible that Fire & Blood Part 2 and the rest of A Song of Ice and Fire could refute this claim, but it would require Martin to backtrack, and it would also require Martin to complete those series, a prospect that looks less likely by the day. For now, and probably for always, Aegon the Conqueror is Aegon the Prophesier.

Aegon's Conquest Could Further Explain The Song Of Ice And Fire Prophecy

With the upcoming Game of Thrones movie, Aegon's Conquest, this updated piece of lore could become cemented in the canon. The film, of which there has been little news, will be about Aegon's arrival in Westeros with his three dragons, some 130 years before the events of House of the Dragon.

In Fire & Blood, we get very little about who Aegon is, save that he is a kingly, powerful Targaryen who everyone fears and respects. A film centered on the character is naturally going to need to give him a little more development. One of the ways in which they can do this is by exploring Aegon's prophecy.

It's this prophecy, Viserys explains, that compelled Aegon to conquer in the first place. In the books, he does it because he can. This version of events would give Aegon more of a divine reason to subjugate and kill thousands of people, providing a more nuanced and thematic start to the Game of Thrones saga.