**Two Weeks After Monaco**
Harry was in the Sanctum's training room, practicing dimensional combat techniques with Master Daniel, when his phone rang. Tony Stark's contact photo—a selfie he'd apparently added himself during their flight back from Monaco—filled the screen.
"Should I be concerned that he has access to my phone settings?" Harry asked.
"You should be concerned about many things regarding Tony Stark. His access to your phone is relatively low on that list." Daniel gestured for him to answer. "Go. I need to catalog anyway. Try not to agree to anything that will give me more paperwork."
Harry answered. "Hello?"
"Harry! Buddy! Friend! Person who saved my life and therefore has to tolerate my phone calls!" Tony's voice was slightly manic, energetic in a way that suggested either inspiration or impending disaster. "Quick question: how attached are you to the name 'Monaco Armor'?"
Harry blinked. "What?"
"Monaco Armor. Your superhero name. The one the media gave you because you dramatically revealed yourself in Monaco wearing impressive armor." Papers rustled in the background. "It's terrible. Very geographical. Very literal. Lacks poetry. We need to workshop something better before it sticks permanently."
"I don't need a superhero name."
"You absolutely do. You're public now. You need branding. Identity. Something that sounds intimidating but not evil. Heroic but not cheesy." A pause. "I've been brainstorming. Want to hear my ideas?"
"Not particularly."
"Excellent, I'll tell you anyway. Option one: Crimson Guardian. Very protective, the color matches your armor, sounds vaguely mystical. Option two: The Hallowed Knight—I saw the symbol on your chest, looked it up, couldn't find anything but it clearly means something important. Very mysterious. Option three: Death's Champion, which is extremely dramatic and probably accurate based on what you've told me, but might scare children. Thoughts?"
Harry sat down heavily. "You've been thinking about this."
"I've been *obsessing* about this. JARVIS has seventeen documents worth of potential names, rankings, and focus group analysis. Well, I'm the focus group, but still. It's very scientific." Tony's tone shifted slightly. "But seriously—you need a name you choose, Harry. Before someone else chooses it for you. Trust me on this. I announced myself as Iron Man because I wanted control of the narrative. You should do the same."
"I'll think about it."
"Think faster. Every day Monaco Armor stays in circulation is a day closer to it becoming permanent. Also, and this is the real reason I'm calling—I'm having a birthday party. This weekend. Malibu. You should come."
"I don't do parties."
"You do now! You're a public superhero. Public superheroes attend social events, make appearances, remind people they're human. Or in your case, immortal-but-trying-to-seem-human. Same principle." Tony was clearly moving while talking, multitasking in that way he did constantly. "It'll be fun. Music, drinks, interesting people. Pepper's organizing so it'll be classy. And you can meet Rhodey—my best friend, Air Force colonel, currently furious with me for multiple reasons but he'll get over it."
"Why is he furious?"
"Because I'm dying and handling it poorly. But that's not important. What's important is you coming to California, celebrating my continued existence, and workshopping superhero names with me over expensive alcohol."
Harry should say no. Should maintain distance. Should remember that getting too involved with Tony Stark's personal life was asking for complications.
But the armor pulsed with interest, and the Ancient One had said to engage with the world, and honestly, Tony sounded like he needed someone around who wouldn't just enable his self-destruction.
"Fine," Harry said. "I'll come. But I'm not workshopping names."
"You'll workshop names. It's going to happen naturally through conversation. I'm very subtle about these things."
"You're the least subtle person I've ever met."
"Exactly! Which means when I try to be subtle, it's unexpected and therefore more effective. Psychology, Harry. Learn it." Tony's voice brightened. "Excellent. I'll send you flight details. First class, obviously. Unless you want to just portal directly to Malibu, which would be extremely convenient and save me money."
"I'll fly commercial. Like a normal person."
"Boring, but respectable. See you this weekend! Don't forget to pack party clothes! JARVIS, note that Harry's attending, adjust catering numbers, and remind me to finish the Mark VI before I do something stupid at my own party!"
The line went dead.
Master Daniel looked up from his cataloging. "You're going to a birthday party at Tony Stark's house."
"Apparently."
"The Ancient One will find this either amusing or concerning. Possibly both." Daniel returned to his work. "Try not to expose any more magical secrets on social media. Once was dramatic. Twice is developing a pattern."
---
**Stark Malibu Mansion - That Weekend**
Harry arrived at Tony's house via normal methods—flight, car service, absolutely no portals—and immediately understood why people called it excessive. The mansion clung to a Malibu cliff like it was defying gravity and good taste simultaneously. All glass and steel and aggressive modernism, with an ocean view that probably cost more than most countries' GDP.
The party was already in full swing. Music pounded from speakers Harry couldn't see, people in expensive clothes milled around expensive spaces, and the whole thing radiated "wealth meeting entertainment meeting possible disaster."
Happy met him at the door, looking harried. "Harry! Thank God. Actual responsible person. Come in, please tell me you can help me keep Tony from doing something catastrophically stupid."
"That's a tall order."
"I know. I'm desperate." Happy ushered him inside. "Pepper left about an hour ago. Had a fight with Tony about—well, everything. He's drinking, which is fine. He's drinking while wearing the Iron Man suit, which is less fine. He's currently demonstrating the suit's waste filtration system to a crowd of increasingly concerned guests, which is actively concerning."
Harry followed the sound of cheering to find Tony—indeed in the Iron Man armor, sans helmet—holding court in the middle of his living room. The Mark IV suit gleamed red and gold, and Tony was gesturing dramatically while explaining something that involved too much technical detail for a party.
"—complete filtration and recycling system!" Tony was saying, slightly slurred. "Drink goes in, armor processes it, converts it to drinkable water. I've essentially achieved perfect sustainability. I could survive indefinitely in this suit drinking nothing but my own—"
"Tony," Harry interrupted, moving through the crowd. "Maybe save the hydration lecture for when you're sober?"
Tony's head whipped around, the armor moving with unsettling grace for something being piloted by a drunk person. "Harry! You came! You're wearing black! Very mysterious! Very on-brand!" He moved closer, the suit's servos whining slightly. "Tell these people I'm a genius. They think I'm crazy. I need validation."
"You're a genius. You're also drunk and wearing a weaponized suit at your own party. Those things aren't mutually exclusive, but they're concerning."
"Concerning is my middle name. Well, technically it's Edward, but concerning should have been an option." Tony turned back to the crowd. "Ladies and gentlemen, this is Harry Potter! The Monaco Armor! The man who saved my life by being extremely dramatic in crimson! He's also immortal, which I'm not supposed to mention, but I just did, so surprise!"
Several guests looked between Harry and Tony with the kind of confusion that suggested they couldn't tell if this was a joke or a very strange reality.
"He's joking," Harry said smoothly. "Too much champagne. Tony, where's Pepper?"
"Gone! Left! Decided I'm a lost cause and departed for destinations unknown! Probably somewhere with responsible people and functional relationships!" Tony's tone was light, but there was something brittle underneath. "But that's fine! I'm fine! This is fine! Everything's fine!"
"Everything's clearly not fine," a new voice said.
Harry turned to see a man in Air Force dress uniform—late thirties, serious expression, radiating the kind of controlled frustration that came from dealing with Tony Stark for extended periods. This must be Rhodey.
"Colonel Rhodes," Harry said, extending his hand. "Harry Potter. Friend of Tony's. Trying to prevent disasters."
"Good luck with that. I've been trying for twenty years." Rhodey shook his hand, then focused on Tony. "Tony. Take off the suit. You're drunk, you're being reckless, and you're embarrassing yourself."
"I'm not embarrassing myself! I'm entertaining! These people came to my party to see Iron Man, and I'm giving them Iron Man! Very generous of me!"
"This isn't Iron Man. This is you having a meltdown in a weaponized suit." Rhodey's voice hardened. "You're dying, Tony. I know it, Pepper knows it, and instead of dealing with it, you're throwing parties and acting like everything's fine. It's not fine. You're not fine. And you need to stop pretending."
"Oh, so now we're doing the intervention thing? At my birthday party?" Tony's repulsors flared slightly—not threatening, just reactive. "Great timing, Rhodey. Very sensitive. Should we get a cake? Make it really festive?"
The crowd was backing away, sensing the confrontation escalating. Harry's armor stirred, assessing threat levels, showing him potential outcomes. None of them good.
"Tony," Harry said carefully. "Maybe we should move this somewhere private—"
"No! No private conversations! I'm done with private! Everything's public now! Harry exposed himself in Monaco, I'm exposing myself now!" Tony gestured broadly, the suit moving with him. "You want to know why I'm having a party while dying? Because what else am I supposed to do? Sit in my workshop and wait for the end? Spend my last days being responsible and sad? That's not me. This is me. This has always been me."
"This isn't you," Rhodey said quietly. "This is you scared. And instead of admitting it, you're pushing everyone away. Pepper, me, everyone who actually cares about you. But we're not leaving, Tony. No matter how hard you try to make us."
"Then maybe you should!" Tony's voice cracked. "Maybe you should all just accept that I'm dying and let me do it on my own terms! Without the concerned looks and the interventions and the constant reminder that I failed to solve the one problem that actually matters!"
The room went silent. Even the music seemed to fade, leaving just Tony's breathing, harsh and uneven through the suit's speakers.
Harry saw movement from the corner—Natalie Rushman, wearing a dress that was more suggestion than fabric, leopard print and extremely distracting. She was moving with purpose, phone to her ear, clearly communicating with someone.
SHIELD. She was calling SHIELD.
"Tony," Harry said, keeping his voice level. "You haven't failed. You're dealing with an impossible problem with the time you have. That's not failure. That's—"
"Denial?" Tony laughed bitterly. "Because that's what this is. Denial dressed up as acceptance. Pretending I'm fine with dying when I'm terrified. When every day I wake up with higher blood toxicity and less time and the knowledge that everything I built, everything I am, ends soon. And there's nothing I can do about it."
Rhodey moved toward the workshop. "Then let me help. Let someone help. You don't have to face this alone."
"Yes I do!" Tony turned to follow him. "Because everyone who helps me gets hurt! That's the pattern! That's what happens! People get close to Tony Stark, and Tony Stark's problems become their problems, and eventually—"
He stopped.
Rhodey was in the workshop, standing in front of the Mark II suit—the silver prototype that Tony had built and then shelved.
"What are you doing?" Tony asked, something dangerous creeping into his voice.
"What you won't." Rhodey activated the suit. The armor opened, and he stepped inside with practiced efficiency that suggested this wasn't his first time seeing how it worked. "If you're going to have a meltdown in a weaponized suit, then I'm making sure there's someone here who can stop you if necessary."
The Mark II closed around Rhodey, systems coming online with mechanical precision.
"Rhodey, no—" Tony started forward.
"JARVIS, restrict Tony's suit," Rhodey commanded. "Limit offensive capabilities."
"I'm sorry, Colonel Rhodes, but I'm unable to comply with that request without Mr. Stark's authorization."
"JARVIS, you're fired!" Tony's helmet deployed, voice modulating through speakers. "Rhodey, take off my suit. Now."
"No. Not until you sober up and deal with your problems like an adult."
The two suits faced each other in the workshop, the crowd pressing closer to watch, phones out and recording because of course they were.
Harry felt the armor pulse urgently. *This is going to escalate. Intervene.*
"Both of you, stop," Harry said, moving between them. "This isn't helping anything—"
Tony fired a repulsor—not at Rhodey, at a bottle on the bar. It exploded spectacularly. "If you want to take my suit, Rhodey, you're going to have to fight me for it!"
"Tony, don't be stupid—"
"Too late! Already committed!" Tony fired again, this time at Rhodey directly.
Rhodey blocked with the Mark II's arm, the impact sending partygoers scrambling. "Fine! You want to do this? We'll do this!"
They fought.
Not seriously—not trying to kill each other—but with enough force to demolish Tony's very expensive house. Repulsors fired, walls cracked, the guests fled screaming, and Harry stood in the middle of it making a command decision.
The Armor of Agamotto manifested around him in an instant—crimson and steel and glowing amber eyes. The Deathly Hallows symbol blazed on his chest.
"ENOUGH!"
His voice boomed with magically enhanced authority, and both suits froze mid-attack.
Harry raised his hands, and golden light erupted from his palms. Not mandalas—something simpler, more primal. Pure force, channeled through the armor, creating a barrier between Tony and Rhodey that neither could break through.
"You're both acting like children," Harry said, and his voice carried the weight of someone who'd watched friends die fighting each other. "Tony, you're having a breakdown and taking it out on everyone around you. Rhodey, you're trying to help, but escalating a drunk argument into a suit battle isn't helping. Both of you need to stop. Now."
Tony's faceplate lifted. He looked exhausted, manic, and deeply, profoundly scared. "Harry—"
"Take off the suit, Tony. Sober up. Deal with your problems instead of destroying your house."
For a long moment, Tony just stared at him. Then, slowly, the Mark IV began disassembling. Piece by piece, the armor folded away, leaving Tony standing in his rumpled party clothes, looking smaller and more human than he had all night.
Rhodey's faceplate lifted too. "I'm taking the suit, Tony. Not to hurt you. Not to steal it. But to make sure the military has access to your technology in case something happens to you. Because you're dying, and the world needs Iron Man even if you're not here to be him."
"Rhodey—" Tony's voice cracked.
"I'm sorry. But this is bigger than us. Bigger than our friendship." Rhodey sealed the Mark II and fired the repulsors, shooting up through the ceiling and into the night sky.
The house was suddenly very quiet except for the sound of settling debris.
Tony collapsed onto a couch, head in his hands. The few remaining guests who hadn't fled were recording everything, phones out, capturing Tony Stark's complete breakdown for posterity and social media.
Harry let his armor shift back to civilian clothes and moved to sit beside Tony. "Your house is destroyed."
"I know."
"Your best friend just stole your suit."
"I know."
"You're going to have the worst hangover of your life tomorrow."
"Looking forward to it." Tony looked up, and his eyes were red. "You must think I'm pathetic. The great Tony Stark, falling apart at his own birthday party."
"I think you're scared. And handling it badly. But I don't think you're pathetic." Harry stood, offering his hand. "Come on. Let's get you somewhere that isn't a demolished mansion full of people recording you for the internet."
Tony took his hand, letting Harry pull him up. "Where?"
"Somewhere with donuts. I've heard those help with existential crises."
"They really don't. But I appreciate the optimism."
---
**Randy's Donuts - Early Morning**
They ended up sitting inside the giant decorative donut on top of Randy's Donuts in Inglewood. Because apparently when Tony Stark wanted donuts while hungover and emotionally destroyed, he committed to the aesthetic.
Harry had portaled them there—screw subtlety, Tony already knew about magic—and now they sat in the absurdly large pastry, eating actual donuts and watching the sunrise over Los Angeles.
"So," Tony said, biting into a glazed donut that was doing nothing for his hangover. "That party was a disaster."
"Comprehensive disaster. You destroyed your house, fought your best friend, and exposed me to your entire social circle as the Monaco Armor. Very efficient."
"I'm an overachiever. It's my thing." Tony finished the donut, already reaching for another. "Thanks. For stopping me. For not letting me hurt Rhodey or myself. For getting me out before I did something even stupider."
"You're welcome. Though I maintain that drinking in a weaponized suit was already peak stupid."
"Fair point." Tony was quiet for a moment. "I am dying, you know. It's not dramatic exaggeration. Blood toxicity's at fifty-three percent. My medical projections give me weeks, maybe. And I don't have a solution. I've tried everything. New elements, filtration systems, alternative power sources. Nothing works. The thing keeping me alive is killing me, and there's nothing I can do about it."
Harry thought about the Ancient One's words. About Stark needing to find his own solution. About not interfering with someone's journey even when you could.
But sitting here, watching Tony destroy himself slowly, making bad decisions because he'd lost hope—that wasn't a journey. That was just cruelty.
"What if I told you there might be an answer?" Harry said carefully. "Not from me. Not directly. But from your own past. Your father's research."
Tony's head whipped around. "What do you know about my father's research?"
"Less than you do. But I know people who know things. And they've suggested that Howard Stark was working on something revolutionary. Something involving new elements. Something you might be able to use."
"Howard was working on a lot of things. Most of them dead ends." But Tony's expression had shifted—curiosity replacing despair. "Are you saying SHIELD has his research? Because I've asked, and they've stonewalled me."
"I'm saying you should ask again. More insistently. With the kind of determination that built an arc reactor in a cave." Harry met his gaze. "You're not dying, Tony. Not if you fight. Not if you remember that you're the genius who solves impossible problems. So stop having breakdowns at parties and start solving this one."
Tony was quiet for a long moment. Then he smiled—small, genuine. "You're very motivational for an immortal wizard who dresses like he shops at Gap."
"I contain multitudes."
"Speaking of which—" Tony pulled out his phone, despite the early hour and his hangover "—we still need to workshop your superhero name. Monaco Armor is trending again after last night's disaster. Time's running out."
"You're relentless."
"It's part of my charm. Now—I'm still partial to Crimson Guardian, but I've thought of new options. Deathless Knight? Very dramatic, references your immortality. The Scarlet Sentinel? More poetic. Armor of—" He stopped. "Wait. What's your armor called? You said it has a name."
"The Armor of Agamotto. After the first Sorcerer Supreme who found it."
"Agamotto. That's... actually cool. Old-school mystical. Very Arthurian." Tony typed rapidly. "What about just keeping that? Agamotto's Champion? The Agamotto Armor? Or—" His eyes lit up. "The Crimson Knight. Simple. Direct. References your armor color, the mystical knight aesthetic, sounds intimidating without being evil. What do you think?"
Harry considered it. The name fit—better than Monaco Armor, at least. Evoked the right imagery without revealing too much.
"The Crimson Knight," he tested. "It's not terrible."
"That's the most enthusiastic you've ever been about anything! I'm taking it as approval!" Tony was already typing. "JARVIS, note that Harry's superhero designation is now The Crimson Knight. Update all files, prepare press release for whenever we go public with this—"
"Please exit the donut," a voice said from below.
They looked down to see Nick Fury standing next to a black SUV, eyepatch somehow more intimidating in dawn light. He looked annoyed, which seemed to be his default state.
"How did you find us?" Tony called down.
"I'm a spy. Finding people is literally my job. Now get down here. Both of you. We need to talk."
They climbed down—Tony with hangover-induced clumsiness, Harry with magically enhanced grace that made Tony mutter something about unfair advantages.
Fury gestured to the donut shop. "Inside. I've already cleared it out. Let's have this conversation somewhere that isn't a giant pastry."
The shop was indeed empty except for one booth where someone sat with their back to them. As they approached, the person turned.
Natalie Rushman. Except she wasn't wearing her party dress anymore. She was in a sleek black tactical suit that looked painted on, red hair pulled back, expression professionally neutral.
"Tony," Fury said. "Meet Agent Natasha Romanoff. She's been monitoring you for several months on SHIELD's behalf."
Tony stopped mid-step. "Wait. Natalie is—you're a spy?"
"Legal liaison was a cover." Natasha stood, moving with predatory grace. "Sorry for the deception. It was necessary."
"Necessary. Right. Because spying on me while I slowly died was—" Tony swayed slightly, and Harry caught his arm. "I'm having a very weird morning."
"About to get weirder," Fury said. He nodded to Natasha, who moved behind Tony. "This is going to sting."
She jabbed something into Tony's neck—fast, professional, before he could react.
"Ow! What—" Tony's hand went to his neck. "Did you just inject me with something? Without consent? That's assault! That's—" He stopped. "Wait. I feel... less terrible. What was that?"
"Temporary stabilizer," Fury said. "Lithium dioxide. Won't cure you, but it'll buy you time. Lower your blood toxicity, slow the progression. Enough time to figure out a permanent solution."
Tony stared at him. "You have a treatment. You've had a treatment. And you didn't—"
"We needed to see how you'd handle the pressure. Whether you'd break or adapt. Whether you'd become a threat or remain an asset." Fury's expression was hard. "You're unstable, Stark. Reckless, self-destructive, and a potential danger to yourself and others. But you're also necessary. So we're giving you a chance. One chance. To fix yourself, prove you can be trusted, and become the hero you keep claiming to be."
He pulled out a large box from behind the counter, setting it on the table with a heavy thunk.
"Howard Stark's research," Fury said. "Everything he was working on before he died. Including notes on a new element he theorized but couldn't synthesize. We think you can. We think that's your cure." He looked at Harry. "And you—The Crimson Knight, as we're apparently calling you now—you're going to help him. Make sure he doesn't do anything stupid while solving impossible physics."
"I can do that," Harry said.
"Good. Because if Stark dies, we lose Iron Man. And we need Iron Man for what's coming." Fury moved toward the door. "Agent Romanoff will be staying with you, Stark. Official SHIELD liaison. She'll monitor your progress, provide support, and report back. You don't get privacy anymore. That's the price."
"Wait," Tony said. "What about Rhodey? He took the Mark II."
"Let him. The Air Force will weaponize it, call it War Machine, and you'll have an ally in the field. Consider it a happy accident from your very unhappy party." Fury paused at the door. "One more thing—don't destroy any more houses. Property damage reports are a paperwork nightmare."
He left, the door closing behind him with finality.
Tony, Harry, and Natasha sat in silence for a long moment.
"So," Tony said eventually. "That happened. I was injected without consent, given my dead father's research, and assigned a very attractive SHIELD handler. It's barely dawn and my life is already extremely weird."
"Welcome to SHIELD oversight," Natasha said. "It's going to be fun."
"Your definition of fun concerns me." Tony looked at the box, then at Harry. "You knew. About the research. About SHIELD having a treatment. That's why you told me to ask again."
"I knew people who knew things," Harry said. "And those people wanted to help. But you had to be ready to accept help. Last night—that party—that was you ready. Finally admitting you couldn't solve this alone."
"So I had to have a complete breakdown before the universe gave me answers. That's very poetic and I hate it." But Tony was already opening the box, pulling out folders and blueprints, his brilliant mind already engaging with problems. "Okay. New element. Theoretical physics my dad couldn't achieve with 1970s technology. I've got modern particle accelerators, JARVIS, and apparently a mystical immortal wizard as my lab partner. This should be interesting."
"It'll be more than interesting," Natasha said. "Agent Coulson will be arriving tomorrow to supervise. He's very thorough."
"Oh good. More supervision. Just what I need." Tony looked at Harry. "You're staying, right? Helping with this? Because if I'm going to synthesize impossible elements while being monitored by spies, I want at least one person in the room I actually like."
Harry thought about the Ancient One's mission, about engaging with the world, about the fact that he'd already thoroughly abandoned any pretense of staying detached from Tony Stark's journey.
"I'll stay," he said. "Someone needs to make sure you don't accidentally create a black hole."
"That was one time! And it was very small! Barely noticeable!"
"You created a black hole?"
"Briefly. JARVIS contained it. Very responsible of him."
Natasha was smiling despite herself. "This is going to be an interesting assignment."
They sat in the donut shop as the sun rose over Los Angeles, surrounded by Howard Stark's research, planning how to synthesize a new element that might save Tony's life.
Harry's phone buzzed. Text from the Ancient One: *Interesting choices continue. Stay with Stark. Help him. This path leads to better futures. Also, Crimson Knight is acceptable. Better than Monaco Armor.*
Harry smiled and pocketed his phone.
The Crimson Knight.
He could work with that.
---
**Stark Mansion Workshop - Late Evening**
Tony had finally crashed around midnight, exhausted from reviewing his father's research and the lingering effects of his hangover. Harry had helped him to a guest room, then returned to the workshop to find Natasha still there, going through files with professional efficiency.
She looked up as he entered, and something shifted in her expression—assessment, curiosity, and something else Harry couldn't quite identify.
"You don't sleep much," she observed, setting down a folder. "Immortality perk?"
"One of many extremely inconvenient perks." Harry leaned against the workbench, watching her. In the workshop's blue-white lighting, her SHIELD uniform looked even more impractical—tactical, yes, but designed by someone who understood that appearances were weapons too. "You're very good at what you do. The legal liaison thing was convincing."
"Thank you. I've had extensive training in deception." She moved closer, her body language relaxed but controlled. Everything about Natasha Romanoff was controlled. "You're good at what you do too. Keeping Tony alive, grounded. He trusts you. That's rare."
"He's easy to care about. Once you get past the arrogance and the self-destruction."
"Is that why you're here? Caring about him?" Natasha tilted her head, studying Harry like he was a puzzle she was solving in real-time. "Or is it orders from your mysterious organization?"
"Both. Mostly the first one, if I'm honest." Harry met her gaze directly. "What about you? Is this just an assignment, or do you actually care whether Tony lives or dies?"
"I'm a professional. Personal feelings don't factor into my work."
"That's not an answer."
Natasha smiled—small, genuine, surprised at being called out. "No, it's not." She moved to sit on the edge of the workbench, closer now. "You're perceptive. Most people don't see past the cover."
"I've had practice seeing what people hide." Harry paused, considering his next words. The armor hummed with interest, encouraging. "Can I ask you something potentially invasive?"
"You can ask. I might not answer."
"The thing inside you. The enhancement. It's not magical, but it's not entirely technological either. Alchemical, I think. Based on life-extension formulas that are very, very old." Harry watched her expression carefully. "The Infinity Formula. Or something derived from it."
Natasha went absolutely still. Her hand moved subtly toward a weapon Harry knew she had hidden somewhere, then stopped. "How do you know about that?"
"Because before I came to Kamar-Taj, I spent ten years wandering. Learning. Studying everything I could find about magic, alchemy, ways to break curses or understand them. I met alchemists, studied with hermits, read texts that dated back millennia. Nicholas Flamel's work came up more than once." Harry kept his voice casual, non-threatening. "The Elixir of Life was his masterwork. Immortality through alchemy. I'm guessing someone—Russian intelligence, maybe earlier—acquired his research. Adapted it. Created something that extends life without granting true immortality. Close enough to feel familiar to someone like me who carries Death's mark."
"You can sense it." Not a question.
"The Resurrection Stone. One of the artifacts bound to my soul. It recognizes altered life, unnatural extensions. You register to it the same way I probably register to whatever sensors SHIELD uses to track enhanced individuals." Harry smiled slightly. "Don't worry. I'm not going to tell anyone. Your secrets are your own. I'm just curious—does it hurt? The Formula?"
Natasha's posture relaxed fractionally. "You're full of surprises, Potter."
"That's becoming my brand. Surprising people while wearing crimson armor."
"The Crimson Knight." She said it like she was testing the name. "Better than Monaco Armor. Tony was right about that." Her expression turned considering. "To answer your question—no. It doesn't hurt. Not physically. But knowing you're living on borrowed time, that your life is extended by science you don't fully understand, that you're a weapon someone else created and deployed... that has its own kind of pain."
"I understand that more than you'd think."
"I know. That's why I'm actually talking to you instead of deflecting." Natasha was quiet for a moment. "You're dangerous, Harry. Not because of your power—though that's considerable. But because you see people. Really see them. That makes you either the best ally or the worst enemy."
"I prefer ally. Enemy sounds exhausting."
She laughed—genuine, surprising them both. "You're very strange. Immortal wizard-warrior who shops at Gap and makes jokes while discussing alchemical enhancements. SHIELD doesn't know what to do with you."
"Good. I'd hate to be predictable." Harry moved slightly closer, aware they'd drifted into something that felt less like professional conversation and more like... something else. "Can I ask another invasive question?"
"You're two for two. Might as well go for three."
"Is this—" he gestured between them "—part of your training? The flirtation, the chemistry, the way you're looking at me right now? Or is some of it actually real?"
Natasha's smile turned sharper. "What makes you think there's flirtation?"
"Because I've been alive long enough to recognize when someone's interested. And you're either genuinely intrigued by the immortal wizard, or you're very good at pretending to be. I'm trying to figure out which."
"Maybe it's both." She slid off the workbench, moving into his space with deliberate intent. "Maybe I'm intrigued *and* following training. Maybe the fact that you can tell the difference makes you more interesting. Maybe I haven't decided yet whether seducing you would be strategic or just personally satisfying."
Harry's breath caught. She was close enough now that he could see the faint scars on her hands, could smell whatever subtle perfume SHIELD issued to their covert operatives, could feel the heat of her presence.
"And if I said I'd prefer honest interest over strategic seduction?" Harry asked quietly.
"I'd say you're incredibly naive for someone who's supposedly decades of wisdom crammed into an eighteen-year-old body." But Natasha's expression softened. "I'd also say... I don't know yet. Give me time. Let me figure out where professional ends and personal begins. If it does."
"That's fair."
"You're very understanding for someone who just got told 'maybe I'm manipulating you, maybe I'm not.'"
"I've been manipulated by experts. The Ancient One's been guiding my choices for years. At least you're honest about the uncertainty." Harry stepped back, giving her space. "For what it's worth—I like you. Both the professional spy and whoever you are underneath that. If the interest is real, I'm interested back. If it's not, I'll survive. I'm good at surviving."
Natasha studied him for a long moment. "You're going to be a problem, Potter."
"I've been told that before."
"I believe it." She moved toward the door, then paused. "Thank you. For not treating the Formula like a weakness. Most people who figure it out... they see it as something to exploit."
"Most people are idiots. The Formula keeps you alive. That's a gift, not a weakness. Even if it came from people with questionable motives."
"You really are naive." But she smiled. "Get some sleep, Harry. Tomorrow's going to be interesting. Tony's going to try to build a particle accelerator in his basement, and someone needs to make sure he doesn't accidentally destroy Malibu."
"That's a very specific concern."
"That's very justified based on his history." She left, closing the door quietly behind her.
Harry stood alone in the workshop, surrounded by Tony Stark's organized chaos, and tried to process what had just happened.
He'd flirted with a spy. A very beautiful, very dangerous spy who might or might not actually be interested in him for reasons that might or might not be professional.
The armor hummed with amusement.
"Don't start," Harry told it. "I'm allowed to be interested in people. Even people who might be manipulating me."
The armor's satisfaction was palpable.
Harry sighed and headed for his own guest room, already knowing sleep would be difficult.
The Crimson Knight, learning that protecting people was complicated when some of those people were attractive Russian spies with alchemically extended lifespans and smiles that could probably kill.
This, he decided, was going to be interesting.
Very interesting indeed.
---
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