As normal I run sudo apt update but for the past few times I have been getting the following errors:

Hit:1 http://archive.ubuntu.com/ubuntu noble InRelease
Hit:2 http://security.ubuntu.com/ubuntu noble-security InRelease                      
Hit:3 http://archive.ubuntu.com/ubuntu noble-updates InRelease 
Get:4 https://brave-browser-apt-release.s3.brave.com stable InRelease [7,546 B]
Hit:5 http://archive.ubuntu.com/ubuntu noble-backports InRelease 
Err:4 https://brave-browser-apt-release.s3.brave.com stable InRelease
 The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0686B78420038257
Get:6 https://packages.mozilla.org/apt mozilla InRelease [1,522 B]
Err:6 https://packages.mozilla.org/apt mozilla InRelease
 The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C0BA5CE6DC6315A3
Fetched 7,546 B in 1s (9,340 B/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up-to-date.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://brave-browser-apt-release.s3.brave.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0686B78420038257
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.mozilla.org/apt mozilla InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C0BA5CE6DC6315A3
W: Failed to fetch https://brave-browser-apt-release.s3.brave.com/dists/stable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0686B78420038257
W: Failed to fetch https://packages.mozilla.org/apt/dists/mozilla/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C0BA5CE6DC6315A3
W: Some index files failed to download. They have been ignored, or old ones used instead.

I have checked around, and looking in the folder sources.list.d I found four files:

brave-browser-release.sources

mozilla.list

mozillacorp-ubuntu-mozillavpn-noble.sources.save

ubuntu.sources

How do I make it such that I don't see these messages? I looked online for the answer but apparently the answer that most people gave was apt-keys which was depreciated and not recommended. So I'm not sure what to do. It recommended gpg but I don't know what that is or how to use it.

I'm on Kubuntu 24.04

Title: Cosmological Crossovers

Author: Raxaon

Rating: G

Language: English

Length: 2,621

Status: Incomplete

Link: Here is the link.

Summary: In this chapter, I focus on an Elden Ring crossover with House of the Dragon. I focus on an overarching lore and worldbuilding aspect. Giving a summary of the political situation within the Elden Ring faction, the events that led up to it, and the arrival of the Elden Ring faction from the POV of the House of the Dragon characters.

A few months ago I wrote an outline for how a HotD and Elden Ring crossover could work.

Well I've fleshed out this outline and created a concept fic, that gives the background and world building of how the two universes could realistically collide.

I am not sure about what this style of fic is, or what catagories it falls under, but I hope you enjoy!

Fic Summary

>When Heaven offered Charlie a solution to end the exterminations. She jumped at the chance. All she had to do was marry an angel, never see her father again, and stay in Heaven for eternity. She didn't really think of the "after".

A follow up series in my Marriage of Heaven and Hell universe, focusing on Charlie, Vaggie, Emily and Sera in Heaven, and Lucifer in Hell. This is a sequel to the fic: How Charlie met Emily.

TV Tropes Page: The Marriage Of Heaven And Hell

Chapter Summary

>The Exorcists await for the arrival of their new General, the High Seraphim Sera.

New freedoms. New rules. New names. How will one Exorcist react to the changes that she brings? How will she see her new commander? What will be the first life-changing step that she will take?

Heya, I just put out a Chapter of my new fic! It's a chapter from the POV of the average Exorcist who see's Sera for the first time.

I am making a new character for a home-game and I need some help fleshing out the level progression. We start at level 3, and I am planning to go variant human with the metamagic adept feat.

I really like the Genie Warlock class, and honestly it fits the vibe of my character well.

But I also want to have some Sorcerer levels for additional spells and more metamagic options/points.

I need some help with:

1. How many levels in Sorcerer I should go down?

(If I go a 2 level dip, then I get my Warlock stuff online faster and more metamagic points. If I go a 3 level dip then I get 2nd level slots and 2 more metamagic options, but is it worth it?)

2. What Sorc Subclass works best for a 2-3 level dip?

3. Which of the 4 genies are the best to go for?

4. What order should I do my levels? Warlock 1, Sorc 3, Warlock +16. Or some other combination?

>Fic summary

When Heaven offered Charlie a solution to end the exterminations. She jumped at the chance. All she had to do was marry an angel, never see her father again, and stay in Heaven for eternity. She didn't really think of the "after".

A follow up series in my Marriage of Heaven and Hell universe, focusing on Charlie, Vaggie, Emily and Sera in Heaven, and Lucifer in Hell.

This is a sequel to the fic: How Charlie met Emily.

TV Tropes Page: The Marriage Of Heaven And Hell

>Chapter summary
Sera learns that when you want something done right, you have to do it yourself. A POV chapter of Sera, as she finally see's the truth about her army.

Heya, I just put out a Chapter of my new fic! it's a Sera focused chapter and it is nearly the combined length of all of the other chapters! Approximately 8000 words!

I hope you all enjoy it!