Image Details: “BILIBIN, Ivan [Ива́н Я́ковлевич Били́бин] (1876-1942). 🇷🇺 Ivan Tsaryevich-Grey Wolf-Firebird, 1899.” by Halloween HJB is marked with CC0 1.0

Hello! The Firebird is a figure in Slavic / Russian folklore, and there are many translations and versions of a story that features this character. Many of them also feature a character named Ivan, and the famous ballet retelling of it includes the evil sorcerer Koschei as the antagonist who has captured thirteen princesses, and the Firebird helps Ivan free them by defeating Koschei.

I am not an expert on all versions, but I read a novel retelling of the story, Firebird by Mercedes Lackey, many years back and the version of the story she draws on has Ivan (in her story, called Ilya) as a maligned youngest brother of many brothers who are all bullies to him for his interactions with the Firebird, before he sets off on the adventure that brings him to the realm of Koschei.

But if I were to guess, if SJM draws from any version it will be The Firebird ballet by Stravinsky. I will grab a few quotes from that Wikipedia page that summarize the ballet’s story and bold the details that map to what we know about Vassa and Koschei, from Elain’s seer visions and from Vassa’s own words about Koschei in ACOWAR:

The ballet centers on the journey of its hero, Prince Ivan. While hunting in the forest, he strays into the magical realm of the evil Koschei the Immortal, whose immortality is preserved by keeping his soul in a magic egg hidden in a casket. Ivan chases and captures the Firebird and is about to kill her; she begs for her life, and he spares her. As a token of thanks, she offers him an enchanted feather that he can use to summon her should he be in dire need.

Prince Ivan then meets thirteen princesses who are under the spell of Koschei and falls in love with one of them.

Then later:

Exhausted, the creatures and Koschei then fall into a deep sleep. While they sleep, the Firebird directs Ivan to a tree stump where the casket with the egg containing Koschei’s soul is hidden. Ivan destroys the egg, and with the spell broken and Koschei dead, the magical creatures that Koschei held captive are freed and the palace disappears. All of the “real” beings, including the princesses, awaken …

I don’t believe SJM will do a literal retelling but instead, similar to what she did with Beauty and the Beast and the legend of Tam Lin in ACOTAR (the first book), draw on elements from the source material but combine it with her own world building to tell us a new version. The only players I feel sure would play a role in a retelling of this in the ACOTAR universe are Lucien (Ivan/Ilya), Vassa (the Firebird), and Koschei (Koschei). 

More thoughts after the break that contain ACOSF SPOILERS about my ideas for what could happen in future books, given the above lore I think SJM is drawing on.

What I would LOVE is, if Lucien goes on an adventure to Koschei’s lake on the continent to face Koschei in order to free Vassa, that Elain would join him, perhaps from two motivations: 

1) To offer her seer powers in aid of this mission that would track back to the wider plot conflict already set up, with the remaining human queens, Fae wanting to land grab in the human realms (e.g., Beron), the Trove, and of course, Koschei; and, 2) Perhaps, as a way to finally face her mating bond with Lucien, not necessarily to accept it immediately, but if they travel together to help the wider conflict, they could test the bond together and see if this is something they both want to choose or not (and Lucien would absolutely go for this because, even though the chance of a rejection lays at the end of the journey, he wants to figure this out as much as she does)….then cue an Elucien love story that is layered into the Firebird retelling ☺️

And yes, I just showed my Elucien cards, but this theory of how their book could go technically allows for either outcome. But whether Elain is involved as I am speculating here, or less so, I honestly believe Lucien will be the one to travel to the continent to face Koschei to free Vassa from her curse, and free the other girls Koschei has trapped in the process. 

This single line in ACOSF, ch. 7, bolded at the end of the political discussion about Koschei, is SJM telling us almost as literally as she can from the middle of the narrative, that this is what is coming, and I adore SJM for putting this in there, easing my Lucien, Firebird-loving heart that my hopes for this plotline are well founded:

“Certainly.” Vassa peered at her hands, fingers flexing. “I fear what may happen if he ever gets free of the lake. If he sees this world on the cusp of disaster and knows he could strike, and strike hard, and make himself its master. As he once tried to do, long ago.”

“Those are legends that predate our courts,” Eris said.

Vassa nodded. “It is all I have gleaned from my time enslaved to him.”

Lucien stared out the window—as if he could see the lake across a sea and a continent. As if he were setting his target.

I always hoped this would be the next full length novel after Nessian’s, but now I’m thinking it might be the last one because it would end with Koschei’s demise, and he seems to be the big baddie for this trio of novels, of which ACOSF was the first. 

Plus the Az POV bonus chapter makes me think SJM is setting us up for him being a main character in the next book, which makes me think we’re finally going to get the Az / Mor situation resolved, and that they both find partners (in Gwyn and Emerie 👀 showing more ship cards, sorry not sorry!) once they talk out 500 years of tension and pain. 

So the Firebird retelling may get punted one more book, which in my head means Elain’s story is held off for another book as well… though Elriel shippers might see her playing a main role in an Az novel, and thus the debates continue until we know more ☺️ (she says cheerfully - no anti hate here please!).

I hope this answers your question about the Firebird fairytale and how I see it playing a role in a future book! Apologies for also weaving in my ship theories and predictions. ☺️ But IMO Lucien freeing Vassa from Koschei does not depend on any ship being endgame, and I am ready for SJM’s creativity to shine as she (hopefully!) retells this story for us!