The season 3 finale of House of the Dragon is here, and the earth-shattering Battle of Tumbleton isn't the only trick it had up its sleeve. While all eyes were on major locations like Tumbleton and King's Landing, a quiet reveal at Harrenhal dug deep into the lore of Westeros for a shocker that will send diehard fans of George R.R. Martin's fantasy world reeling.
Alys Rivers (Gayle Rankin), the woods witch of Harrenhal, is much, much older than we thought. And her story goes all the way back to one of the most infamous figures in Westerosi history, who met his fiery end during Aegon's Conquest.
MAJOR SPOILERS ahead for House of the Dragon season 3 episode 8.
Who is Harren the Black? Alys Rivers' mind-blowing backstory explained
As Aemond Targaryen (Ewan Mitchell) recovers from his poisoning at the hands of his mother, Alicent Hightower (Olivia Cooke), Alys sits with him and finally lets down her walls. She tells Aemond a truth she's likely told no other living soul in many years: she once had a son who was horribly burned, and she made compacts with old magic to try and save him.
From a lore standpoint, the crucial thing isn't so much what Alys did for her son, as when she did it. Alys was the wife of Harren Hoare, known more widely by the name Harren the Black. Harren ruled as the last King of the Isles and the Rivers, back when the Ironborn controlled not just their own islands, but the Riverlands as well. He was a hated figure in his own time who ruled with legendary cruelty.
It was Harren who commissioned the building of Harrenhal, because he coveted a grander seat than his predecessors used in the city of Fair Market. The construction of Harrenhal took nearly 40 years, brought the Riverlands and Iron Islands to the brink of financial ruin, and led to the deaths of thousands of slaves who perished while working on the fortress. On top of it all, sacred weirwood trees were felled for lumber for the castle. Is it any wonder the place is cursed?
Harren's reign lasted up until Aegon's Conquest, when he was an old yet still ferocious man who stubbornly resisted Aegon's demands for surrender, even when Aegon offered to let him keep his castle in return for his fealty. Harren holed up inside his fortress to prepare for a siege, but Aegon would not spend the time nor the lives on one. He descended on Harrenhal on his dragon, Balerion the Black Dread, and melted it to slag with Harren and his entire family inside. This is why the castle is in such a decrepit state by the time of House of the Dragon and Game of Thrones.
It's long been believed that Harren's entire bloodline perished in that assault...but House of the Dragon has just amended that, at least for the HBO television version of Westeros.
As Alys reveals to Aemond, she was the mother of one of Harren's sons. He has four in the lore — we don't know if Alys is the mother of all of them, or simply one of this terrible king's paramours. When Aegon burned the castle, Harren and Alys' son burned along with it...but he survived, much like Aemond's brother, Aegon II (Tom Glynn-Carney) survived being burned at Rook's Rest. And just like Aegon, there was a terrible toll on his body that threatened to shorten his life significantly.
Alys tried everything to heal her son, until eventually, she got desperate and turned to older magics. Those failed her too, because dragonflame is a primal and magical force of its own, and its burns are not easily healed. Her son died, leaving her alone in the world.
It was then that Alys discovered the cost of her dabbling with ancient magics. She doesn't specify the details, but it sounds like she tried to take her own life and wasn't able, because she had gained a form of immortality. Her curse, as she tells Aemond, is to keep living and bear witness to all the petty lords who come to control Harrenhal following the death of her great and terrible husband. She cannot leave the Riverlands, and is forever bound to Harren the Black's ruined fortress.
How old is Alys Rivers?
The thing that makes all this so mind-blowing is not only that House of the Dragon tied Alys Rivers' origins around to one of the most infamous figures in Westerosi history, but also that it establishes her age to be supernaturally long, similar to Melisandre from Game of Thrones. Aegon's Conquest took place around 130 years before the Dance of the Dragons civil war. Considering that she was already having kids at that point, that likely makes Alys well over 150 years old.
It also adds so many layers of significance to her relationship with Aemond. Alys witnessed the burning of Harrenhal firsthand, which means she actually remembers seeing Balerion the Black Dread in action for one of his most infamous attacks. The next closest thing to that which has occurred in the TV version of Westeros is Aemond's raid on Harrenhal at the beginning of season 2, where his dragon Vhagar burned the Blacks' garrison and remaining soldiers in the castle. Vhagar's attack gave off immense burning of Harrenhal vibes, and now we know why: the show was likely drawing an intentional parallel between Aemond's arrival and meeting with Alys, and the last time Alys witnessed such Targaryen destruction upon her castle.
This also explains why Alys is so indifferent to the death of Ser Simon Strong (Simon Russell Beale) and all his sons. House Strong is the fifth house to hold Harrenhal, including Harren the Black's own House Hoare. Alys has watched each of those houses come and go, likely not ruing any of their passing.
On top of that, it also means that Alys was around when Dreamfyre laid the dragon eggs that she showed Aemond earlier in episode 306. She would have been at Harrenhal all through the self-imposed isolation of Rhaena Targaryen, the sister of King Jaehaerys the Conciliator. I can only imagine what sorts of interesting conversations these two powerful women might have had during those 17 years.
This backstory for Alys Rivers is never revealed in George R.R. Martin's book Fire & Blood, which offers several thin possibilities for the woods witch's history. Two of the book's conflicting historical sources believe her to be the bastard of Lyonel Strong, Larys Strong's father. The other believes she's far older, and served as a wet nurse to Lyonel's sons as well as Lyonel himself decades earlier. Martin loves to play with these sorts of ambiguous explanations in Fire & Blood, and it's very likely we'll never learn his version of Alys' true origins — unless it's confirmed that this bombshell comes from him personally.
Regardless of whether Alys' backstory came from Martin or is an invention of the show, it's one of the better examples of House of the Dragon fleshing out the lore of Westeros in a fascinating way that's sure to excite longtime fans and newcomers alike. Alys Rivers has carved out a space as one of the most enigmatic figures in the series, and now we know a bit more about her motivations, and how she came by her mysterious powers.
All episodes of House of the Dragon season 3 are now streaming on HBO Max. Season 4 is expected to launch sometime in 2028. We'll see more of the witch of Harrenhal and her betrothed, Aemond Targaryen, when the show returns for its final outing.
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