1 - 20 of 527 Works in Red Kryptonite (DCU)
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Taste of Red by Anonymous
Fandoms: Superman - All Media Types, Superman (Movie 2025), Smallville
12 Oct 2025
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Lex looks beautiful like this. Bound in his bed with his wrists tied together wearing nothing but a thin silk robe that showed more than it covered.
Kal could have had this and more if Clark wasn't too busy being a coward to take it. Lex always wanted him. Even back then when he was trying to kill him, he still wanted him.
Even now after they've reached an agreement, an alliance, a fragile friendship, Lex still hasn't changed. He still wants him. And if Clark isn't sure how to proceed, Kal is and he will not let Lex slip through his fingers like Clark is willing to.
Series
- Part 1 of Kryptonite Series
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The Luthor Project by silentarmor
Fandoms: Superman (Comics), Superman - All Media Types, Superman (Movie 2025), DCU (Comics), Justice League - All Media Types, Peacemaker (TV 2022), DC Extended Universe
11 Oct 2025
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Rick Flag Sr. dropped a folder on the table with bureaucratic resignation. “The A.R.G.U.S. Strategic Oversight Directive for the Containment and Rehabilitation of Enhanced Nationals,” he announced. “That’s its official designation, and I expect you to use it.”
Hal stared. “Catchy.”
Barry raised a hand. “Pretty sure your people on the observation deck are calling it The Luthor Project.”
“No one calls it that,” Flag snapped. “And if they do, they’ll be filling out triple the paperwork.”
“What’s the directive, General?” Diana asked.
“Simple,” Flag said. “Luthor needs oversight. A.R.G.U.S. decided it should come from one of you.”
Hal smirked. “You mean us—the League?”
Flag shook his head. “No. I mean him.”
Every head turned toward Superman.
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The Form of Crunching Numbers by Starlighter_Varda
Fandoms: Superman - All Media Types, Superman (Movie 2025), Superman (Comics)
10 Oct 2025
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Self-awareness and control were among Lex Luthor's many strong suits, and he knew that allowing himself to sink into obsession yielded great results.
But what he couldn't understand was why his focus was being torn between taking down Superman, an alien threat, and coveting the attention of Clark Kent, a Midwestern journalist.
Or why his fixation on Clark was threatening to consume him whole.
_______________________________Or, How Lex Luthor's Two-Headed Obsession with One Man Derailed His Life.
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Kara slowly comes to, caught on the precipice of consciousness, her senses struggling to catch up with her muddled state of mind. The first of her senses to announce its return is feeling which is definitely a downgrade when every single inch of her body is in pain.
The asphalt is rough and cool against her cheek, and she soaks up the feeling as her body is burning up. Her cape half draped across her body, almost like a blanket, and she contemplates staying on the ground
Or
What would happen if Reign stayed around a little longer and everyone had to deal with the repercussions.
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Clark Kent's Kissing Experiment by Gabi3301
Fandoms: Superman - All Media Types, Superman (Movie 2025), Smallville, Batman - All Media Types, DCU
09 Oct 2025
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For Elizabeth Harper, the universe has always made sense through equations and logic. She is the girl who finds order in chaos, who believes every problem has a solution. But the heart of Clark Kent—her best friend and childhood neighbor—is a chaotic variable she cannot solve. When he asks for help to win over Lana Lang, Beth agrees, disguising her own desire for Clark under the logical pretext of applying a 'scientific method' to the problem, treating their kisses as a controlled experiment. The result, however, is an explosion of data she cannot predict: primitive jealousy, buried secrets, and an attraction that defies any law of physics. It is a journey about a girl who tries to control the uncontrollable, only to discover that the most powerful—and devastating—emotions are those that defy any formula.
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Kryptonite by hrtskila
Fandoms: Superman (Movie 2025), Superman - All Media Types, Smallville
08 Oct 2025
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Somewhat Smallville reference, Clark Kent and Lex Luthor were friends because of Clark saving him. They get older and start to be enemies. They had a past of being lovers for a split second but then Lex changed and they split apart and barely spoke for years. Now Clark Kent is hiding his identity as Superman, partly living with his friend/co worker Lois Lane. Meanwhile, Lex Luthor, already knowing Superman’s identity, his former lover, friend, everything, is hiding a secret of his own. Two secrets to be exact. Two 13 year old secrets.
Lex and Superman are obsessing over each other, knowing exactly who one another is. The two secrets, are obviously secrets. But a little mishap and Clark finds out about those secrets..
Anyways enjoy?
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waiting for the fire by Neery
Fandoms: Batman v Superman: Dawn of Justice, Batman - All Media Types, Superman - All Media Types, DC Extended Universe
05 Oct 2025
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"Why did you come to me? You've got no reason to trust me."
"I don't. I just didn't have any other options. You weren't afraid of me. Please," Superman gasped. "Someone needs to stop me."
He turned his head aside and scorched a ragged line over the concrete, several feet away from where Bruce stood.
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Lois meets Red-K Clark in a Metropolis night club and makes an impulse decision. A year later, she finds him naked in a cornfield.
p1 set between s2 and s3; p2 set at the beginning of s4
SECOND CHAPTER ADDED <3
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After divorcing Helen, Lex Luthor did not expect to be married again so soon.
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Red Kryptonite and Red Rears by PrinceC
Fandoms: Invincible (Cartoon 2021), DCU, Superman - All Media Types
28 Sep 2025
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Invincible falls through a portal and joins up with Superman to help defeat a raging kaiju. It's too bad that the monster in question has a certain affect on the Man of Steel that affects his relationship with the new hero.
Series
- Part 50 of Heroes: Humiliated
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He could feel Bruce behind him at the doorway, watching.
“He was alone a long time,” Bruce said quietly. “He might not be the same man you knew when he wakes up.”
Lex was alive, and Bruce found him.
Series
- Part 2 of Kal and Bats
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[ red kryptonite! clark kent x reader ]
When Clark embraces his true calling to take over earth for the Kryptonian race, his relationship with you strains greatly. Still, he's determine to get into your good graces even if the two of you are on opposite sides of a growing conflict.
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Like the Spectacled Bear by ZadieWrites
Fandoms: Superman - All Media Types, Batman - All Media Types, Justice League - All Media Types
05 Sep 2025
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In a universe where the aggression characteristic of red kryptonite actually comes from a fear response, Clark is exposed to this variant of the mineral and suddenly becomes distrustful of everyone in his support system. Bruce Wayne is Bruce Wayne about it.
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Following a disastrous previous attempt at the Fortress of Solitude, Bruce decides that the best place for Clark to test out new strains of Red Kryptonite is alone with him in the Batcave.
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Alex manages to knock out the last goon in the room. She pants as she signals to the team to keep moving. She waits for the agents to exit the room before quieting her voice. “It’s- it’s not good, Lena…”
Lena stops in her tracks, pressing the phone harder against her ear to ensure she doesn’t miss anything.
“We lost contact with Supergirl about 20 minutes ago. Last report that came in was Kryptonite was present. We’ve been trying to push our way through to her, but…”
“Has there been any sign?”
“There’s been a few craters and holes punched through the walls. We are following the trail, but we still can’t raise her on comms.”
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Kara's life is in danger. Lena does everything she can to find and save the love of her life. When they do find her, she's not the same. The question is: will she ever be?
Series
- Part 29 of Supercorp Stories
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Lionel finds Clark in Metropolis. He thinks Clark's running from memories of Lex, and he may be right.
Series
- Part 1 of recursion
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Martha Kent goes on a business trip conveniently close to the sea, and insists Clark joins her to the famed Capeside Resort. Lo and behold, Lois Lane is there as well, coincidentally.
Loosely set after season 6. Basically every beach episode in any series ever, but with Clark and Lois.
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Risky Business by Sparkler468
Fandoms: Superman - All Media Types, Batman - All Media Types, DCU
29 Aug 2025
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When a suspicious murder brings Bruce Wayne to Metropolis University, he uncovers a plot that could undermine everything he's ever worked for...
Clark just wants to graduate on time, but a certain Bat can be pretty distracting...
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Everyone in National City had their story about that time Kara Danvers tried to hide the fact that she’s Supergirl and failed miserably– not that Kara herself thought so. It was practically a rite of passage amongst the city folk, it was inevitable that if you’d lived in the city for long enough eventually you’d be privy to at least one disastrous fumble by the maiden of might.
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A series of oneshots where civilians figure out Kara Danvers is Supergirl.
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“You’re mine Lena, and I’m yours forever.” Kara said, her eyes intense and dark as they collided with Lena’s. The heiress threw her arms around Kara’s neck and sighed happily against her as the hero pulled her in for a tight hug, holding her flush against her body, almost possessively.
“Yes Kara, I’m yours.” Lena whispered into her ear.
The brunette was so caught up in the moment and the feel of being in her future wife’s arms that she missed the red glow in Kara’s veins as her hands moved up and down her back.
And the flash of crimson in the depths of her azure eyes.
AKA Kara gets infected by Red Kryptonite through her engagement ring.