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Chapter 75: Post credit chapter

Notes:

As I teased, there is gonna be one post-credit scene, which is available now ✨

The ✨last chapter of Shattered past!✨

Of course, as I promised, there are all the arts I created for this fic, underneath the chapter; together with character profiles I prepared (already hyping for sequel I guess). I hope you’ll enjoy this last part and happy rest of 2025!

(See the end of the chapter for more notes.)

Chapter Text

Location: classified

 

There was a lot of buzz after getting new intel that Cassandra was to become an agent of Shield. It was still kept mostly secret, but the word spread out between higher level agents. Agent Gombert mentioned it during the classified meeting of the French basement. Agent Furlow was surprised to hear this news, but others knew it was just a matter of time. They just didn’t know it’d come so soon. They really made a good call by giving the mission to Gombert.

 

Basement leader Furlow supposed it was rushed, but agent Gombert assured him they’d officially make her an agent only after she goes through the whole training and psychological evaluation by professionals. They didn’t want to send someone unstable on missions. She was getting stable.

 

Agent Laval was listening carefully to the entire meeting too. He supposed Shield would want to achieve their goals with her as soon as possible, but that would make it a bit more complicated for him. They still didn’t have counter-measures ready on her if she turned against them. He knew she was way too powerful and could mess up the entire basement if she went rogue. 

 

He was in contact with the team developing the weapon against her, updating them about the whole progress. They couldn’t do any testing so far, since she was very careful when it came to leaving any rocks behind. She said it herself during one meeting - she wouldn’t let anyone do tests on those rocks and she meant it. The only ones available were in her hall, where her tent was and that was off the menu. Shield didn’t allow anyone to have scientific access to them. The other one was her sword she kept hidden in her room. All the others were removed.

 

It seemed she knew what could happen if she let them have free access to them. Maybe she was already defeated once with the similar settings. Theories were there, but they couldn’t really do any progress without testing. 

 

They had some parts of the amber she was found in still available. It was hard to measure how it was formed, because they found out it consisted of some unknown elements. They knew the amber was the only tangible weakness she had, but only during the time she was in direct contact with it. Trying to recreate the amber, their attempts seemed to be unsuccessful every time. It never had the same composition.

 

The whole mission took way too long and without any results. Agent Laval had to push the scientific team developing the weapon, since he had to answer for that mission and would need to explain again why they still didn’t have any results. Those to whom he had to answer were growing impatient.

 


 

Today, agent Sitwell contacted him again, asking about the progress. “Tell me you've moved forward with it.”

 

Agent Laval didn’t want to disappoint him, since they already had some big plans moving but this part was still stagnating. “We haven’t been able to successfully recreate the composition yet, but we’re getting closer.”

 

He couldn’t just leave this in the negative tone and had to give him another intel just to make sure they weren’t getting furious with the entire research yet. These guys weren’t so forgiving and didn’t tolerate the failure. “On another note, we have new information about her. I was present at a classified meeting with representatives and they’re already moving onto the next phase. Shield is getting fast and I’m afraid we’re losing the upper hand on the involvement on this mission. They want to make her an agent. It may be a big problem in the long run. She seems to trust Shield enough for her to join.”

 

It wasn't positive news either, but Sitwell could see this coming. Shield got to this one first and they lost the upper hand way before she was a big deal. He sighed, replying: “We were worried that this would happen in the next few years. If it develops too quickly, we need to be prepared. Project R.E.S.I.N. has to be fully operational once the big day comes. Hydra must not be caught napping at this issue. She isn’t under our control. Once Shield weaponizes her, she will be too much trouble.”

 

Agent Laval knew these risks too well: “I assume once they recruit her, there is no way of replicating Hydra’s index protocol…”

 

“We have no means of separating her from Shield, and the director already has his eye on her. This won’t be any agent Starr treatment, deep in the shadows. You need to figure out how to stop her. She’s a high priority asset. Removing her would be a waste, considering how powerful intel she hides about that stone. I have another high-ranking source saying she still hasn't told them anything. You do your part, I’ll do mine.”

 

Agent Laval sighed, knowing this way too well. He wanted to end this call on a positive note though, since this mission has been a disappointment so far. Shield was winning her. “Don’t worry, we have an operative following her closely and reporting everything important, slowly gaining her trust. After all, the strongest intel comes from the ones she trusts. We have a backup. We’ll make sure the R.E.S.I.N. is ready when the time comes, and if not, we’ll figure out other measures.”

 

“Good,” Sitwell nodded, ending the call, being glad Hydra had an agent in her close proximity.

 

Agent Laval exhaled, being glad they didn’t have to argue about this and that Sitwell stayed calm. He had other resources that were of much higher rank. They weren’t panicking yet, but she was making them worried. They still trusted his team could make this work. 

 

 


 

✨ARTS OF CASSMCU✨

 

#Prologue (Chapter 1), 2021

 

#Pain and regrets (Chapter 5), 2020

 

#First meeting (Chapter 7), 2021

 

#Haunted by the past (Chapter 10), 2021

 

#Snapshots of time (Chapter 16), 2021

 

#Exhaustion (Chapter 23), 2021

 

#Present understanding - comic (Chapter 25), 2021

Comic page 1

Comic page 2

Comic page 3

Comic page 4

 

#First therapy meeting (Chapter 42), 2024

 

#First outside experience (Chapter 49), 2023

 

#Room for powers (Chapter 56), 2024

 

#Hike (Chapter 59), 2024

 

#The trip (Chapter 67), 2021

2025, sketch

 

#Summer hikes with Megan (Chapter 70), 2023

 


 

✨ARTS & SKETCHES✨ (NOT BY CHAPTERS):

 

#2020

First CassMcu concept, 2020

 

Cass outfit sketches, 2020

 

First Gabe sketch, 2020

 

First Megan sketch, 2020

 

Cass colored sketch, 2020

 

Gabe colored sketch, 2020

 

#2021

Concept Cass & Nat comic cover, 2021

 

Random Cass sketches, 2021

Cont.

 

Cass with rocks, 2021

 

Bored Cass, 2021

 

Annoyed Cass, 2021

 

#2022

CassMcu character sketches, 2022

 

Summer Cass, 2022

 

Christmas Cass, 2022

 

#2024

Winter Cass, 2024

 

Cass & Gabe sketches, 2024

 

Cassandra sketches, 2024

 

#2025

Cass & Megan sketches, 2025

 

Character portraits (all), uncolored, 2025

 

Character portraits (all), colored, 2025

 

 

Notes:

And that’s all folks! 🏁

Small Hydra tease, it’s definitely gonna be interesting to see this whole Shield circus unraveling once Cass is part of the team. 👀

A small cheat sheet for those who don’t know Marvel that much:
• Hydra is an evil organization from the nazi era that was destroyed by Captain America but they silently regrew back within Shield itself (so now, there are tons of undercover Hydra agents that work for “Shield” while influencing the way they operate for their advantage)
• For those that may know some bits of MCU (Antman & the Wasp or new Thunderbolts movie), Ava Starr aka Ghost was in similar situation to Cass but she was found by Hydra “Shield” first and they weaponized her and made her kill for them without Shield knowing she even exists
• Agent Sitwell & Laval are Hydra obviously
• who knows how many agents you already know are Hydra as well?! (fun part, 2014 will have the peak for this storyline; for this era, they’re only the sleeping agents acting like any other Shields)
• Agent Coulson and director Fury are 100% not Hydra :) yay

Anyways, usually I ask what you liked about the chapter, but this time I’m curious about something else:
👉What was your favorite part of this entire story? (I’m really curious!)
👉And what do you expect from the sequel/what are you hyped about the most? 👀

I’d love to chat with anyone that enjoy this story a bit more, I love when you guys comment or talk about this fic.

Even though I don’t yet have any cover for Shattered Past yet, I’m already working on printing this story and having it in my hands, so I’ll probably put it into sequel’s notes once I’m ready next year and who knows… maybe I’ll print some extra copies for those most invested!

Hope you enjoy arts as well as reading this story, since it’s probably one last thing that gets me hyped about drawing digitally anyways (besides that, I just posted only one finished & colored piece here . if you want to check it out) & you can support me on my insta as well (I’m putting #CassMcu hashtag on each piece from this fic)

Anyways, happy new year 2026 for those that read this a bit later! Hope to see you soon^^

PS: character arts & short bios are in the end-of-the-fic notes 👇

Notes:

So, after 5,5 years writing, 4,5y of publishing here on AO3, this fic is finally finished! Thank you all that got to the end and hope to see you soon with the sequel being prepared!

This is actually my first ever fic I wrote & I’m glad I had a small community for this great idea about Cass being in MCU! Starting in pandemic, this story was my way of coping with that crap and I guess it’s visible throughout the entire first arc when Cass was quarantined as well. Ever since I started writing, I knew this story would have multiple parts since there’s so much to explore in Marvel world!
We got some small hints already, some Avengers references or guest appearances, but they’re gonna get even more prominent in the next part when Cass is fully integrated into MCU.

Shattered past was never meant to be about Cass becoming a superhero, but about her healing (from the brutal prologue I’m still sorry about😅). It is meant to be psychological drama with 2 main conflicts – Cass vs Cass & Cass vs Shield. I’m glad it worked out well, I almost slipped several times where Cass would rather run away and destroy all of her connections with Shield than to stay with them, but I somehow managed to make it work. Gabe really helped, I had like 3 AUs I had to cut since it would lead to Cass’ doom (yikes😬).

As promised, here are CassMcu most important characters & their bios! (already hyping for the sequel):

These small intros serve as basic information about characters for readers who may not know them too well. They’re published at the end of 1st part of the fic for better clarity of Shield characters; but they’re also in the beginning of 2nd part for those that want to start in part 2 and don’t know much context from 1st part.

Anyways, CassMcu is not ending and hopefully your drive to want to know more neither! Please, let me know what you liked about this story the most!

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