As the Hulk in Danny Phantom/DC/Young Justice

Consciousness returned slowly to Samael, accompanied by a pounding headache and the distinct feeling that his body had been run through a blender.

The lab's emergency lights cast an eerie glow across the room as he pushed himself up from the floor, noting with confusion that he'd somehow ended up several feet from the portal.

"Danny?" he called out, his voice hoarse. His eyes found his brother's unconscious form nearby, Sam and Tucker hovering over him anxiously. But something was wrong – Danny's hair had turned white, and his hazmat suit had inverted colors.

"He's breathing," Sam assured quickly, though her voice trembled. "But Samael... you might want to look at yourself."

Before he could process that cryptic statement, a wave of dizziness hit him. The world tilted sideways, and suddenly he wasn't just seeing the lab – he was seeing memories. A different life. A different world.

Images flashed through his mind: Reading comic books under covers with a flashlight.

Watching news reports about Superman saving Metropolis with Danny.

Debating with Tucker about whether Batman was just an urban legend in Gotham.

The Justice League's first public appearance.

"That's... impossible," he muttered, his head spinning. "Bruce Wayne... the Dark Knight... they're supposed to be fictional..."

But the memories were too vivid, too detailed to be imagination.

"Samael?" Tucker's voice seemed distant. "You're, uh, turning green again..."

The mention of turning green snapped something inside Samael. The memories, the confusion, the sight of his unconscious brother – it all coalesced into a burning rage that felt both foreign and familiar.

"Green?" His voice came out deeper, rougher. "You let my brother go into that portal. You ENCOURAGED him!"

He stood up, and kept standing up – his body growing, expanding, muscles swelling beyond human limits.

His shirt tore away as his frame stretched upward until he towered over the terrified teens. His skin took on an ethereal green glow, semi-transparent like a ghost but solid like a mountain.

"YOU DID THIS!" The words came out as a roar that shook beakers on the lab shelves. Sam stumbled backward, her camera clattering to the floor.

"We... we didn't mean..." Tucker's PDA slipped from his trembling hands. "It was just supposed to be photos..."

"PHOTOS?" Samael – or whatever he had become – slammed a massive fist into a nearby lab table, crushing it like tinfoil. "MY BROTHER COULD HAVE DIED!"

"Samael, please," Sam's voice quivered despite her attempt to sound calm. "We need to help Danny..."

"DON'T SAY HIS NAME!" The rage was overwhelming now, a tide of green fury that threatened to consume everything.

"YOU HAVE NO RIGHT!"

He took a step toward them, the floor cracking under his weight. Both teens pressed themselves against the wall, genuine fear in their eyes.

The sight of their terror should have made him stop, should have reminded him these were his brother's best friends.

Instead, it felt satisfying.

"What in the name of Freud..." Jazz's voice cut through the tension as she appeared at the lab entrance, her psychology textbook slipping from her grasp.

The hulking figure turned, green eyes blazing. "JAZZ, GET OUT!"

"That's... that's Samael," Tucker blurted out, his tech-savvy confidence replaced by nervous energy. "We were just... I mean, Danny wanted to..."

"It was my idea," Sam interrupted, her gothic demeanor cracking under stress. "I convinced Danny to check out the portal. I thought it would be cool, you know? Something different. I even took a photo of him in the hazmat suit and-"

"You encouraged our brother to enter an experimental ghost portal?" Jazz's therapeutic calm wavered. "For a PHOTO?"

"We didn't know it would work!" Tucker's voice cracked. "Mr. and Mrs. Fenton said it was dead! But Danny tripped, and Samael tried to save him, and there was this flash, and now Danny's got white hair and Samael's doing this whole green rage monster thing and-"

"Tucker! Breathing!" Sam cut in. "Look, Jazz, we messed up. Big time. But Danny's breathing, and Samael's... well..."

"THEY COULD HAVE KILLED HIM!" Samael's roar shook the beakers.

"Focus, Samael," Jazz stepped forward, her voice steady despite her racing heart. "Deep breaths. Like we practiced for your pre-calc anxiety."

The green giant's breathing slowed slightly. "They... they risked..."

"I know," Jazz's voice remained firm. Keeping calm despite the bizarre situation. Understanding she could freak out later, right now her little brothers needed her. "And believe me, we'll be having a VERY long discussion about responsible decision-making and peer pressure.

But right now, Danny needs his big brother. The one who helps him with his astronomy homework, not the one putting dents in the lab floor."

"Right... right," Samael's voice began to lose its thunderous quality. "Astronomy homework... constellations... Danny loves space..."

Jazz noticed his size decreasing with each measured breath. "That's it. Remember last week when you helped him map out Orion's Belt?"

"He kept making jokes about alien ghosts," Samael muttered, a ghost of a smile flickering across his still-green features. His height dropped another foot.

A soft groan from Danny's direction drew everyone's attention. The white-haired teen stirred slightly.

"Danny?" Sam took a hesitant step forward, freezing when Samael tensed. But the protective rage seemed to have ebbed, replaced by concern.

The last of the green faded from Samael's skin as he returned to his normal size, though his torn shirt remained a casualty of the transformation. He moved toward Danny, his steps unsteady.

"Ugh... did anyone get the license plate of that ghost portal?" Danny mumbled, his eyes fluttering open to reveal glowing green irises. He blinked, focusing on the gathered faces. "Why's everyone looking at me like that? And why's Sam holding her camera like a shield?"

"Dude," Tucker said, finally peeling himself off the wall. "You might want to look at yourself. And maybe not make any sudden moves around your brother for a while."

"What do you mean look at..." Danny caught sight of his gloved hands, now black instead of white. "What happened to my-" His eyes widened as he phased partially through the floor. "WHAT'S HAPPENING TO ME?"

"Welcome to the club, little brother," Samael said wearily, dropping to sit beside him. "Though I think you got the better end of the deal. At least your clothes still fit."

"This is so not happening," Danny muttered, trying to pull his legs back up through the floor. "Sam, please tell me this is just some weird gothic performance art thing?"

"Sorry, Danny," Sam replied, finally lowering her camera. "But on the bright side, you're probably the most unique thing in Amity Park now. Well, second most unique," she added, glancing nervously at Samael.

"Actually," Tucker interjected, tapping rapidly on his miraculously unbroken PDA, "according to these readings, both of you are giving off similar ectoplasmic signatures. Just... uh, Samael's is about ten times stronger when he's all green and scary."

Jazz pinched the bridge of her nose. "Okay, let's approach this systematically. Danny's phasing through solid objects and has undergone a complete physical transformation.

Samael appears to transform when experiencing intense emotions, particularly anger, into a... significantly larger version of himself with ghost-like properties. Did I miss anything?"

"Just that we need to figure out how to control these powers," Samael said quietly, examining his hands. "Whatever they are."

"We will," Jazz assured, placing a hand on his shoulder. "Together."

A crash from upstairs cut her off, followed by their father's booming voice: "Kids! We're home early! The convention didn't appreciate my presentation on ghost-powered coffee makers!"

All five teenagers looked at each other in panic.

"Oh crud," Danny said, just as his legs turned invisible again.

"Quick!" Jazz took charge, her voice dropping to a whisper. "Sam, Tucker, get upstairs and distract Mom and Dad. Danny, focus on becoming visible again. Samael, find a shirt!"

"How am I supposed to become visible?" Danny hissed, staring at his transparent legs. "This isn't exactly covered in the student handbook!"

"Try concentrating," Samael suggested, rummaging through the lab's emergency supplies for a spare shirt. "Like when you're trying to solve those astronomy problems – focus on one thing at a time."

Sam and Tucker bolted up the stairs, their voices soon mixing with the Fenton parents' enthusiastic chatter about ghost-powered appliances.

Danny closed his eyes, his face scrunching in concentration. Slowly, his legs began to reappear, and his white hair faded back to black. "I... I think I got it?"

"Danny-boy!" Jack's voice boomed closer. "Are you kids down in the lab?"

"Almost," Jazz muttered, watching Danny's transformation complete. "Samael?"

Samael had found a Fenton Works t-shirt in the emergency kit and pulled it on. It was a bit tight, but better than nothing.

More importantly, his eyes had lost their ghostly glow, though tension still radiated from his frame.

"Remember," Jazz whispered as footsteps approached the lab stairs, "act natural. We'll figure this out later."

"Kids?" Maddie's voice called down. "What are you all doing in the lab?"

Danny and Samael shared a look. Their lives had just become infinitely more complicated.

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(Author note: Hello everyone! I hope you all enjoyed the chapter!

Do tell me how you found it.

Marvel comics don't exist in this world, so they wouldn't know that he has become the Hulk.

Well, that's all for now, I hope to see you all later,

Bye!)