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What you've taken from me by TheOcassionalAuthor
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
14 Jan 2026
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In an alternate universe where Mark Grayson fully embraced his Viltrumite heritage and conquered Earth, the one thing he loved was you. But when you died giving birth to his son, Kael, Mark buried your memory and raised the boy under harsh discipline and silence.
Kael grows up believing his mother abandoned him and blames himself for his father's treatment of him. until one day, he discovers a hidden room filled with relics of a life she never got to live.Through a lost journal and old photographs, Kael learns the truth: you didn’t leave, you died to bring him into the world and Kael got trapped with a father that hates him.
Heartbroken and desperate for connection, Kael makes a promise:
If there’s a version of her out there who lived… He'll find her. Even if it means tearing a hole through the multiverse to bring her home.Series
- Part 2 of Invincible Spin-off series
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William is the healer of the hero’s party. He and his friends, Markus the hero, Eve the mage, and Amber the druid, are destined to defeat Markus's evil twin brother, the demon king.
One problem though, the demon king is in love with William.
WillMark RPG AU -
Eeny, Meeny, Miny, Moe by DarkBlueShiori
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics), Harry Potter - J. K. Rowling
13 Jan 2026
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Sixth year Hogwarts student, member of the DA, and Hufflepuff prefect. Surely there's nothing you can't do.
Then you fall through the veil after Sirius Black.
Then you meet Mark Grayson. Or a Mark Grayson. Hopefully one of the nicer ones.
Told in the Marks POVs. Their lives and the witch that changes them for the worse cause hey, she's just a girl.
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Turns out, worldwide terrorism doesn’t account for overworked college students taking naps.
Or—The Invincible War starts after you finish working a full shift and, somehow, the day only gets worse from there. You would’ve appreciated a heads up that multiple variants of Invincible have unfinished business with you.
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When Rex nearly dies during the Invencible War, it’s a variant of the Invincible who saves him.
Not a hero. Not a kind person. A weird Viltrumite from another reality.
The variant is stranded on Earth, and over time, he begins to infiltrate Rex’s life… slowly, like a silent storm. He doesn’t understand humans. But he seems willing to try, as long as it’s with the one person who made his existence fall apart, the one person worth trying again for.
Not all worlds are created equal. But sometimes, you just need to belong to one.
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RAPUNZEL, RAPUNZEL, TRAPPED IN YOUR LAIR by Sagearie
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
11 Jan 2026
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The story of Rapunzel is a simple one. Man climbs up tower. Man finds a beautiful maiden with long hair. They venture the world together, fight menacing foes, and at the end of it all...
A true loves kiss.
However, unluckily for William, he learns that with every true loves kiss comes the sting of teeth. And very quickly, he realizes that the tower he had climbed was not made as a sanctuary, but as a cage....
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Or: William climbs a tower and finds the lovely Prince Mark waiting inside. William thinks he's got the alpha trapped, but it is much the other way around. -
A Mark on Me by Cindy_rella
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
10 Jan 2026
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William survived the end of the world—barely.
When the eight surviving alternate versions of Mark Grayson conquer his ruined Earth, William becomes more than a survivor: he becomes a replacement.
To some, he’s a lost love.
To others, a pet.
To all of them, an obsession.He doesn't belong to any of them. But in a world where they’ve destroyed everything else, they’ve agreed on one thing:
He’s not allowed to leave. Ever.
When eight twisted versions of Mark Grayson conquer his Earth, William becomes their shared obsession. He’s not their William—but that doesn’t matter. He’s all they have now. And they won’t let him go.
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Omni Mark spends one more night with Amber.
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- Part 32 of Flashfics x Invincible
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William has been kidnapped by a lovesick, psychotic variant of his best friend. Another variant appears and rescues him, but instead of taking him home. He takes William to a shelter full of alternate variants of himself.
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- Part 1 of Shelter for abused Williams
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If he couldn't have his William, his light, and soft waters--no Mark will. But this William was different. He was so similar, so alike with his that it hurt. It hurt too much just to stand aside and watch from unbreakable glass not to touch him. For him, he would and did burn the world. For him, right now, he was his and his alone, even if it was just a lie and pretend.
This is inspired by an artist on Instagram by umikochannart. (https://www.instagram.com/umikochannart/)
Link: https://www.instagram.com/p/DNCAtIxq-E6/?img_index=1 -
𝙎𝙐𝙋𝙀𝙍𝙈𝘼𝙉 | 𝘐𝘯𝘷𝘪𝘯𝘤𝘪𝘣𝘭𝘦 by Hot_Banananaa
Fandoms: Invincible (Cartoon 2021), Superman (Movie 2025)
09 Jan 2026
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It's a 𝘽𝙞𝙧𝙙...
It's a 𝙋𝙡𝙖𝙣𝙚...
It's 𝙎𝙪𝙥𝙚𝙧𝙢𝙖𝙣!
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Multiversal Agent by Neko_crazy123
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics), Multi-Fandom
07 Jan 2026
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-William Clockwell, you've been chosen to be one of our agents.
-....Am I on drugs or something? What the hell is this? Is this a dream?-
-No dreams, this is real, and now congratulations... welcome to the agency.-
-...how the hell did I end up here...-
-Well, you weren't the first choice, but you were the closest thing to replace me?-
-......son of a bitch....-
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In this fic, William will have dangerous and fun missions.
And he'll find himself traveling to different universes.
Series
- Part 1 of agents in action
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Agente multiversal by Neko_crazy123
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics), Multi-Fandom
07 Jan 2026
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—William clockwell ,has sido elegido para ser uno de nuestros agentes
—.....¿estoy drogado o algo así? ¿que mierda es esto? ¿Es un sueño?—
—Nada de sueños,esto es real y ahora felicidades... bienvenido a la agencia—
—....cómo carajo termine aquí...—
—Bueno no fuiste la primera opción pero fuiste lo más cercano para remplazar —
—......hijo de puta....—
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En este fic William tendrá misiones peligrosas y divertidas
Y se encontrará viajando a diferentes universos
Series
- Part 1 of Agentes en acción
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Durante el evento multiversal conocido como la "Invencible War", William Clockwell se ve atrapado en el caos cuando su universidad se convierte en un campo de batalla entre múltiples versiones de Mark Grayson / Invencible. Tras ser salvado de morir aplastado por los escombros por Rick Sheridan (su "casi algo" ), William es "rescatado" de forma abrupta y posesiva por una variante de Mark proveniente de otro universo.
Este Mark, cubierto de la sangre de sus enemigos y con una obsesión protectora y romántica hacia William, lo secuestra para "mantenerlo a salvo", arrancándolo brutalmente de su vida y de Rick. William es llevado a un refugio donde descubre que no es el único: varias otras variantes de Mark (Mohack-Mark, Emperor-Mark, Viltrumita-Mark, Sinester-Mark, Masked-Mark y Fullmask-Mark, omni-mark) han hecho lo mismo con sus respectivos William, creando un harén multiversal.
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We are yours, William by Neko_crazy123
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
06 Jan 2026
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Well, this is unbelievable. First, your best friend, Omega, and now your partner turns out to be half-alien. Then his father becomes a murderer trying to conquer the planet, only to disappear for months... and it doesn't end there. Then your partner goes into space for several more months, supposedly to help a strange grasshopper race, and returns with a purple baby... and of course, it gets even better... several murderous variants invade Earth to make Mark look bad... and well... All the remaining variants want you as their alpha... this is going to be tough.
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Somos tuyos william by Neko_crazy123
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
06 Jan 2026
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Bueno esto es increíble, primero tu mejor amigo Omega y ahora pareja resulta ser mitad alienígena,luego su padre se vuelve un homicida que busca conquistar el planeta para luego irse por meses.....y eso no termina,luego tu pareja se va al espacio por otros meses según para ayudar a una extraña raza de saltamontes y regresa con un bebé morado....o y por supuesto esto se pone mejor.....varias variantes homicidas invaden la tierra para dejar mal a mark......y bueno.
todas las variantes que quedaron te quieren como alfa.....esto si que será difícil.
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When there’s a… by CalliopesScribbles (CassandrasEchoes)
Fandoms: Invincible (Cartoon 2021)
06 Jan 2026
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William isn’t an idiot, he knows Mark is keeping something from him and he wishes he’d stop noticing these new walls his best friend keeps putting up. What’s going on with him that he can’t tell William about? What’s up with this talking book Williams found? And what do you mean the GDA’s taken an interest in him?
Meanwhile Marks trying to find something that makes sense in a world where he just got his powers, the Guardians of the Globe are dead, and his dad’s really set on training him as a hero. But even though he’s a hero now and by all means should get a girlfriend like hero’s in comics do, why doesn’t it feel right? Why do the butterflies in his stomach when he’s close with girls make him uncomfortable instead of feel in love? And what do you mean William will be a hero with him too?
[basically my take on maskless Mark and his William]
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Dive into my ocean eyes by ShinRock
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
06 Jan 2026
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Aveces parece que le pedís al universo algo y quizás te da mas de lo que alguna vez pediste, aunque quizás venga en forma pseudo alienigena.
William no tiene la mejor vida del mundo, lo sabe perfectamente, siente que tiene que cargar con cosas que cree que nadie de su edad debería, aunque por momentos piensa que se lo merece. Hasta que aparece un simpático y parlanchin niño de ojos marrones y cabello negro, que poco a poco hace que su perspectiva de ver las cosas cambie, con una linda amistad de por medio.Es la primera vez que escribo un fan fiction en 8 años, y la verdad no me costo tanto, pero espero poder una historia decente para un fandom pequeño (que amo mucho) que siento que necesita muchas mas historias interesantes, agregare etiquetas a medida que avance la historia.
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Invincible: The Blue Blink by Hetoculus
Fandoms: Invincible (Cartoon 2021), Invincible (Image Comics)
06 Jan 2026
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In another time, another universe, the Grayson's are a family of four. Of which include Nolan, Debbie, Mark...and Emily. As events unfold in this variant universe, Emily Grayson grows up, learns, loves, and struggles. What will she have after 500 years?
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If our love is wrong, fuck everyone! by Anleioz, Marvelanddcgeek for 寿命 (REALBUTTER100)
Fandoms: Invincible (Cartoon 2021)
05 Jan 2026
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Discovering your nature is a huge change that everyone has to go through. Being half viltrumites, and as the sons of Earth's strongest superhero, Markus and Sebastian Grayson will have to endure and explore the challenges that come with it.
Series
- Part 2 of Omni-Thug Twins AU