My City of Heavenly Fire Theories

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Status: Finished  |  Genre: Editorial and Opinion  |  House: Booksie Classic
The title is self-explanatory. These are my CoHF predictions. I wasn't exactly sure what category to put this under so I chose misc. If you have another suggestion, please let me know.

Submitted: May 23, 2014

A A A | A A A

Submitted: May 23, 2014



I'm not even sure if anyone has done this on this site. I know most people make videos about this sort of thing, but I do not have a YouTube channel as I detest making videos.These ideas are scraping the edges of my vital organs like a fork on a plate, and I must get them out.


Okay, so Cassie Clare's final installment of The Mortal Instruments Series comes out in four days. FOUR DAYS! And like a lot of other fans, I'm freaking out. The spoilers and exerpts Cassie has given us aren't exactly comforting. My mind has been mulling over all of them, trying to make sense of them, trying to get some sense of how exactly one of my favorite book series is going to end. Let's get started.



I believe that the two couples that will officially get married are Luke and Jocelyn, and Tessa and Jem. 

Luke and Jocelyn have been engaged since book three, the pour souls, and haven't gotten married yet. It has to happen, which I'll be extrememly happy about because I've loved their pairing ever since I found out he harbored secret feelings for her.

Tessa and Jem. Oh, Tessa and Jem. They are meant to be together just as much as Will and Tessa were. Now that they finally have the chance, I believe they'll go for it. Jem has been Brother Zachariah for all these years and now that he's not, they better jump on that. However, I don't believe their wedding will be in the book. It can't be, seeing as the epilogue in Clockwork Princess takes place after CoHF. Cassie has talked about the UK version having some sort of wedding extra in the back of the book, which will be put online for the the rest of us. I think that it's going to be about Tessa and Jem's wedding. Also, Cassandra Jean (artist who does a large amount of the art for Cassie's work) has released this:


I know that Cassie has also tweeted that Jace and Clary sort of get married, but I don't believe it would count as one of the two weddings. Or it could. I could be wrong.



I'll admit, this idea hadn't occured to me until I watched some CoHF Theory videos on Youtube. The theory is that the heavenly fire that is coursing through Jace's veins will rid Jem of his yin fen addiction. That is absolutely possible. The heavenly fire burns out everything that is evil and impure. Yin fen is a demon drug. It would burn it out. Granted they find a way to get it out of Jace, they would have to use a very small ammount on Jem. If Jem were to intake all of it, he would be in the same predicament that Jace is in now and that would help no one, especially me, since Jem is one of my absolute favorite fictional characters that I've ever had the pleasure of knowing. So, it'll be interesting to see how that plays out. 





This one is simple enough to explain. The sypnosis of CoHF says it all, folks. It says, and I quote, "When one of the greatest betrayals the Nephilim have ever known is revealed, Clary, Jace, Isabelle, Simon and Alec must flee - even if their journey takes them deep into the demon realms, where no shadowhunter has set foot before, and from which no human being has ever returned." This worries me. Very. Much.

Also, if you've read The Bane Chronicles, and I hope you have, the void is mentioned in The Fall of The Hotel Dumort. And honestly, it was terrifying from the outside. I don't know how they'll survive if they actually venture into it.



Okay, so this one is REALLY out there, but I promise I have sound reasoning. You can tell a lot by looking at the artwork for a book! Two pieces in particular have brought me to this conclusion.


1.) Isabelle tugged her tank top back down and glared at her brother. “You don’t knock now?”

“It’s my bedroom!” Alec spluttered.


You really have to think about this one in order to come up with what me and some other fans have come up with. They are in Alec's bedroom. Alec's bedroom is in The Institute. The Institute is on hallowed ground. Simon, being a vampire, cannot be on hallowed ground. Yet, somehow he is in The Institute.


2.) The inside cover art for City of Heavenly Fire, which feature Isabelle, Alec, Jace, Maia and Simon. Below is Simon and Maia, Simon, Isabelle and Alec.


Can anybody tell me why Simon has runes? At first I though maybe it was just the light from someone else's runes reflected on Simon's body, but if you look closer you can see that he has actual runes, light pouring out of each of them. Just like Isabelle and Alec. Maia, another downworlder, doesn't have that, even though the faint traces of markings are also on her skin. I also think the light could be there to portray his Daylighter ability. Another interesting question is why is he wearing glasses? Vampires don't need glasses. Either way, I'm excited to find out what happens with Simon.



1.) We will learn something about Stephen Herondale, something redeeming, something that will help Jace connect with his father more. Unlike some people, I believe that Stephen is, in fact, dead. Whether Jace will choose to keep the Lightwood name or go by Herondale, I'm not sure.

2.) Isabelle will become an Iron Sister. I also didn't think about this until I saw it in a video. This is put under this catagory because I'm just not sure about this one. At all. When Isabelle and Jocelyn went to the Adamant Citadel in City of Lost Souls, Izzy was told that she would make a good Iron Sister. If enough people she cares about die, I cannot see what would stop her from doing that. It's far-fetched, but then again, so was Jem becoming a Silent Brother.



1.) Alec and Mangus get back together

2.) Jem and Jace fight together

3.) Jace and Alec's bond explored more

4.) Simon and Izzy define thier relationship



“Oh God.” said Magnus, “they’re dead. They’re all dead!”

If you've been any attention at all, you know that Cassie has told us that six characters, who we know by name, will die in this book. One of those deaths will happen early on and it will surprise us. A boyfriend will die. A character will also die while trying to save someone else. I don't believe all of them are major characters, (there are some minor characters we know by name as well) and she has said that she doesn't believe in killing characters for no reason. Their deaths will be meaningful which makes it a little easier. Here are my guesses!


1.) Isabelle Lightwood

One of the biggest reasons why I'm not sure about Isabelle being an Iron Sister is because I don't think she will live. I have a couple reasons for this.

Exhibit A: Unidentified Snippet

“Well, it’s a bit ironic, isn’t it?”

“What do you mean?”

“All that effort to convince you I wasn’t in love with you, and here I am, dying in your arms.”

Isabelle and Simon are the only couple who haven't admitted their feelings for one another, but it was more Izzy than Simon. Isabelle is a strong girl and she has been hiding the extent of her feelings for Simon for some time now. 


Exhibit B: This picture of Alec holding Isabelle



2.) Jace Wayland/Morgenstern/Herondale/Lightwood

As much as it pains to heart to say this, I don't think Jace will make it. I think he is the boyfriend that dies. Jace being as headstrong as he is will no doubt fling himself into battle. He will try to take Sebastian down and that will be the end of him. 

What led me to this conclusion?

These two pictures:


Sebastian stabbing Jace with the Morgenstern sword. I have noted the heavenly fire wafting out of Jace. 


The evil, vindictive joy leaking out of Sebastians pores leads me to believe he's talking to Clary. He would take pride in killing Jace for many reasons.


3.) Jordan Kyle

I think that Jordan is the character that dies for another person, that person being Maia. It makes sense. He feels he has wronged her. He's feels extremely bad about what he did to her and he would go to any length to save her.


4.) Alexander Lightwood/Magnus Bane

I'm not sure which one I think is going to die. I have different reasons for both of them.



While this could be any shadowhunter, I couldn't help but feel that it's Alec. His body is how I imagined Alec's to be. A shorter, stockier build than Jace. I also couldn't help but to find some hidden meaning inside the quote. "I feel so light..." LIGHTwood. Boom. That hand and knee could also belong to any shadowhunter.


Most of this is simply speculation. The biggest reason I have for thinking that Magnus will die is because of the message it would send. It would be a very cold irony to Alec for Magnus to die before be did. If you've read the books, you know what I'm talking about. I also feel that Magnus has been around for a very long time and maybe Cassie is ready to say goodbye to him. I think that The Bane Chronicles (10 short stories surrounded around Magnus) were a tribute to him.


5.) Raphael Santiago

Raphael has been a problem for Simon for sometime now. For none other than that reason, I think he will die. After reading Saving Raphael Santiago, it will be a little harder to say goodbye to him.


6.) Johnathan Morgenstern/Sebastian Verlac

We all know that Sebastian has got to go. Having said that, I have very mixed feelings about him. On the one hand, I know that the only way to stop him is kill him. I know that there are some things you just can't come back from and he's done some terrible things. But I also know that none of this is his fault. He didn't ask to be born this way. It wasn't his decision and if Valentine was a different man, Johnathan Morgenstern would of had a regular shadowhunter life. He would of had a family. He would of had a mother, father and sister. I tend to connect to every character in a book and I connected to both him and Valentine. I don't know how I'll feel if and when he dies. 

There is a snippet that people have different ideas about. It could mean different things.


His eyes shone when he looked at her, green as spring grass.

He has always had green eyes, said the voice in her head. People often marvel at how much alike you are, he and your mother and yourself. His name is Jonathan and he is your brother; he has always protected you.

Somewhere in the back of Clary’s mind she saw black eyes and whip marks, but she didn’t know why. He’s your brother. He’s your brother, and he’s always taken care of you.

What do I believe this means? I think once Sebastian dies, after being taken down by Glorious, after the evil is drained out of him, his eyes revert to the color they should have been, which is Clary and Jocelyn's green. I think Clary is looking down at her brother, with his face at peace, all the hardening lines gone, and she sees just that, her brother. For a second, she can't remember what he's done or who he was. She just sees the older brother she should of had.


Oh, look. I said I didn't think they would all be main characters, but most of them are. Good grief.

I fervently hope that I am wrong about most of these deaths. I don't know if I would be able to recover, ever. Never.


I don't know if any of these things will happen. That's what so great about Clare's work. I just thought it would be fun to get my predictions out in the open so I can go back and check them later on, after I've read the actual book. If you're a fellow shadowhunter/downworlder, comment and let me know what you think is going to happen. I'd love to know!

© Copyright 2020 AnonymousAmethyst. All rights reserved.

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