===(Meanwhile at the Top Floor)===

One of the henchmen, his mask obscuring all but the cold determination in his eyes, marched both Sam and Dave into one of the top floors of the towering facility. The door hissed open with a mechanical hum, revealing a room filled with masked henchmen. Several worked at computers, their screens glowing with streams of encrypted data, while others stood stationed at key points, guarding various doors and access panels with military precision. The room buzzed with tension, a sense of danger hanging thick in the air.

"Here's the smart guy," grunted the masked henchman, shoving Dave forward. Sam stumbled slightly, catching himself on the wall.

From across the room, a tall, imposing figure turned to face them. His mask bore jagged edges, resembling a wicked grin, and his voice was cold and sharp as he spoke. This was Swordkill, a name whispered with fear among criminals and heroes alike.

"Good. Hurry up and unlock the vault," Swordkill commanded, his tone leaving no room for argument. His glowing red eyes darted to one of the guards standing nearby. "No luck on the girl yet?"

"You're not the boss here," growled the henchman by the computers. "We're working on it. She's slippery, but it won't be long now."

Swordkill's lips twisted into a scowl under his mask. He ripped the covering from his face and revealed a jagged scar running from his temple to his chin. With a mechanical hiss, the quirk in his left arm activated. The flesh seemed to ripple and morph before solidifying into a massive, gleaming double-edged sword. The blade pulsed faintly, a low hum emanating from it, hinting at its deadly potential.

Swordkill took a menacing step forward, leveling his blade at Dave's neck. The edge of the sword gleamed under the cold fluorescent lights, close enough that Dave could feel its chill against his skin.

"Alright, you heard him," Swordkill said, his voice laced with a dangerous calm. "I'd move quickly if you want to keep your head on."

Dave's eyes darted between the blade and Swordkill's unyielding expression. His heart pounded in his chest, but he forced himself to appear calm, swallowing the lump of fear that had risen in his throat. He glanced back at Sam, who was trembling but seemed physically unharmed.

"Fine," Dave said, his voice measured despite the situation. "I'll begin."

With deliberate movements, Dave approached the nearest terminal. The screen was already glowing with lines of code, the henchmen having bypassed the initial layers of security. His fingers hesitated above the keyboard for a moment before he started typing, inputting sequences, and navigating encrypted files with practiced ease.

.

===(Meanwhile with the UA students)===

The UA students sprinted up the emergency staircase, their footsteps echoing in the narrow space. The climb was relentless, each step growing more taxing as they ascended. At the 30th floor, they paused momentarily to assess their progress.

"We're at level 30," announced Iida, panting lightly as he pointed at the bold number etched beside the door.

"Wait, Melissa," Midoriya said, glancing back at her, concerned. "How high does this tower go?"

Still catching her breath, Melissa leaned against the wall, her chest rising and falling with exertion. "The 200th floor," she managed, her voice tinged with exhaustion.

"Two hundred?!" Mineta shrieked, his face pale. "That's way too many stairs!"

"But it's still better than running into the villains," Momo pointed out, keeping her composure despite her fatigue.

"We have to keep going," (Y/n) said, resolute, already heading for the next flight. The determination in her voice spurred the others to follow.

By the time they reached the 50th floor, the strain was evident on many of their faces. Despite their training, the climb was grueling. Melissa, lagging slightly behind, was struggling the most, her breaths coming in sharp gasps.

(Y/n) noticed and slowed her pace, waiting for Melissa. Uraraka joined her; concern etched on her face as they watched their companion ascend step by step.

"Hey, Melissa," (Y/n) said gently. "Do you want me to use my Quirk on you? I can carry you with my energy."

Melissa shook her head, determination flashing in her eyes. "I'll be fine, but thanks anyway! Save your power for when you need it." With that, she kicked off her shoes and picked them up. "I'll run barefoot, like you."

(Y/n) smiled approvingly. "Alright, let's keep moving."

As they neared the 80th floor, the stairs abruptly ended, blocked by a heavy metal door. Iida reached it first and placed a hand against the cold surface.

"The route's blocked," he announced, frustration clear in his tone.

"What do we do now?" asked Todoroki, catching his breath. "Should we try to break through it?"

"If we did that, the security system might alert the villains," (Y/n) reasoned, her eyes scanning the door.

Mineta, meanwhile, had wandered slightly off to the side. "Why don't we just go through this door instead?" he suggested, pointing to a nearby panel. Without waiting for a response, he reached out and pressed the button.

"Mineta, no!" several voices cried in unison, their panic sharp in the enclosed space.

But it was too late. The button activated, and on the villains' control screens, a notification lit up, alerting them to a door opening on the higher floors.

.

===(Control Room)===

In the villains' control room, one of the henchmen turned to Swordkill, his face grim. "A door on the higher floors just opened."

"What?" Swordkill barked, leaning over the screen. "I thought you said you scanned the building and cleared it!"

The henchman hesitated, then pointed at the screen. "It looks like... it's Twilight and the students with her."

Hearing the report through his earpiece, Wolfram growled. "Trap them on the 80th floor. Use the barriers. Don't let Twilight or those brats escape."

Swordkill nodded sharply. "Understood." He dispatched three henchmen with a curt gesture.

.

===(Back with the UA Students)===

Back on the 80th floor, the students were racing down the hall, searching for another way up.

"Is there another staircase we can use?" Todoroki asked, his voice calm but urgent.

"There should be an emergency staircase at the other end of the hallway," Melissa answered, her voice breathless.

But before they could reach it, a loud metallic clang echoed behind them. One by one, automatic doors began to slam shut, cutting off their escape routes and trapping them in a narrowing corridor.

"Quickly!" (Y/n) shouted, her eyes locking on the final door at the end of the hallway. "Shoto, with me!"

"On it!" Todoroki replied, raising his hand. As the last door began to close, (Y/n) fired two precise energy bolts at the upper and lower hinges to slow its descent while Todoroki froze the space between them with his ice. The combined effort created a small gap, just large enough for someone to squeeze through.

"Tenya!" (Y/n) called.

Iida didn't hesitate. Activating his Quirk, he propelled himself forward, his jet engines roaring as he kicked the door with a powerful burst of energy, breaking it open. The force sent a cloud of smoke billowing out.

"Everyone, through here!" Iida commanded, gesturing for the group to follow.

They scrambled through the opening into a vast, sterile room bathed in bright, artificial light. Rows of glass panels lined the walls, showcasing an array of plants growing in controlled environments. Advanced machinery hummed softly in the background, monitoring and adjusting conditions automatically.

"What is this place?" Midoriya asked, his eyes wide as he took in the sight.

"It's a plant factory," Melissa explained. "They research the effects Quirks have on fauna here."

The group hurried through the space, their footsteps echoing against the polished floor. As they passed rows of genetically modified plants glowing faintly under UV lights, the tension was palpable.

(Y/n)'s enhanced senses caught a faint dinging sound ahead, prompting her to halt abruptly.

"Hold on! The elevator's coming up," she announced, her sharp gaze locking onto the digital display above the elevator doors. The numbers steadily climbed higher, sending a ripple of unease through the group.

"We should hide and let them pass," Midoriya suggested urgently.

Quickly, they dove into a large bush nearby, crouching low. The leaves rustled softly as the group squeezed in, trying to remain undetected.

"I wonder if we can use that elevator to get to the top floor once they're gone," Kaminari whispered.

Melissa shook her head, keeping her voice low. "No. Unfortunately, only authorized personnel can operate it. And the elevator's built like a bomb shelter—we can't even break in."

"Of course, it can't ever be easy," Mineta muttered bitterly, his fists clenching small leaves from the bush.

The elevator dinged again, and the doors slid open. Three villains stepped out, their heavy boots echoing ominously against the polished floor.

The first was a stocky man with short dark hair, a hooked nose, and small, closed eyes. The second had pale yellow skin, sharp teeth, and goat-like features, with a dark green mohawk and a black combat suit. The third was a sleek woman clad in dark-green armor, adorned with intricate snake-like patterns resembling scales. A half-mask mimicked a serpent's mouth, and two swords were sheathed behind her back. Her sharp eyes scanned the area with unsettling precision.

"Judging by their looks, they were at the party," Todoroki whispered, his calm tone betraying his unease.

"The boss said Twilight and the kids are somewhere in the building," the stocky villain grumbled.

"She just had to pick a place with so many hiding spots," the goat-like villain replied irritably. "Let's find her quickly. The boss is getting impatient—he said dead or alive."

The female villain chuckled darkly. "You men can handle the brats. I'm more interested in handling Twilight. None of you understand women anyway."

Hidden in the bushes, the UA students froze. The villains' words hung heavily in the air, and the realization that (Y/n) was being specifically targeted sent a wave of unease through the group.

"They're after us," Uraraka whispered, fear tinging her voice as she clutched at her mouth.

"Stay quiet," Iida ordered firmly, his composed demeanor helping to calm the group's nerves.

(Y/n), however, was focused and calm. She crept forward to the edge of the bush, narrowing her gaze on the villains. Her sharp senses heightened as she watched their movements.

'Don't stop. Don't notice us,' Momo thought anxiously, her hands clasped tightly in silent prayer.

'Just keep going,' Jiro thought, biting her lip.

'I don't wanna die!' Mineta whimpered silently, trembling.

The tense silence shattered as the stocky villain's gaze shifted to their direction. "Hey! We see you, stupid kids!"

The group collectively gasped, fear flashing across their faces. (Y/n) immediately sensed danger, her instincts taking over as her nails extended into sharp claws. But before she could step forward, she caught a whiff of two familiar scents—burnt caramel and hairspray.

Her eyes widened in realization. 'No...'

"What'd you say, ya bastard?" a familiar voice growled from the opposite direction.

The students turned, their faces lighting up with surprise. Kirishima and Bakugou strode into view, both clad in their formal attire. Bakugou glared at the villains with his hands stuffed in his pockets, while Kirishima looked anxious, likely sensing trouble brewing.

"Kacchan? Kirishima?" Midoriya whispered in disbelief.

The villains turned toward the newcomers. "What are you two doing here?" the snake-like woman demanded.

Bakugou scoffed. "Huh. That's what I wanna know too."

Before he could take another step, Kirishima placed a firm hand on his friend's chest, gently pushing him back. "Hey, man, just leave this to me, okay?"

Kirishima stepped forward nervously, scratching the back of his head. "Um, we kinda got lost looking for the party. Can you maybe point us in the right direction?"

The stocky villain growled. "Don't lie to me, or you'll regret it!"

Activating his Quirk, the villain's hand transformed into a large, webbed appendage. With a powerful swing, he unleashed a gust of wind aimed directly at the two boys.

"Kirishima, watch out!" Midoriya shouted.

Reacting instantly, (Y/n) bolted from the bush with her enhanced speed, tackling Kirishima to the ground just as the wind blasted toward them. Todoroki, quick to act, created a massive ice ridge that intercepted the attack, shielding the group.

Bakugou sprinted toward them, his eyes narrowing in shock as he saw (Y/n) atop Kirishima. His usual irritation was momentarily replaced by concern. "Tenshi?"

"(Y/n)? Todoroki?" Kirishima gasped, looking up at his rescuer in surprise.

"Sorry about that. Are you okay?" (Y/n) asked, helping Kirishima to his feet.

"Yeah, I'm good," he replied, brushing himself off.

The villains roared as they began breaking through the ice barrier. Todoroki knelt and created another ice ridge, lifting the rest of the group to safety on the next floor.

"The four of us can hold them off," Todoroki said firmly. "You need to keep moving."

"But—!" Midoriya protested.

(Y/n) cut him off with a reassuring smile. "We'll be fine. Go. We'll join you as soon as we're done here."

Reluctantly, the group nodded, disappearing into the next floor as the ice lifted them. Meanwhile, the villains broke through, their anger palpable.

"What's with this guy's Quirk?" Bakugou muttered, his palms sparking.

"Stay on your guard," Todoroki instructed calmly.

"I don't need you to tell me that!" Bakugou snapped, his fiery temper reigniting

As the villains charged forward, Bakugou and Todoroki began to fight with the male villains while a serpent-like woman slithered through the chaos with eerie precision, her green, scale-patterned armor gleaming under the room's artificial lights. She locked eyes on (Y/n), her sharp, piercing gaze assessing her opponent with chilling confidence.

"You're Twilight, aren't you?" the woman hissed, her voice carrying a venomous edge as she drew her dual swords from their sheaths. The blades shimmered with a sickly green glow, dripping with a faintly smoking liquid—poison.

(Y/n) stepped forward, her movements calm and deliberate, unsheathing her dagger that was hidden under her dress, glinting in her hand. 

"And you must be the one they sent to try and take me down," (Y/n) replied, her voice steady and unyielding. "You should know, you're wasting your time."

The serpent woman smirked, tilting her head as she twirled one of her swords with a practiced flourish. "The name's Venin, and I wouldn't say that. I was hoping for a challenge, but they said you'd be an easy target."

(Y/n) stood firm, her dagger gripped tightly in her hand. The blade was small compared to the twin swords wielded by her opponent, but it glinted with confidence in her grasp. She tilted her head slightly, her lips curving into a calm, unwavering smirk.

"Funny. I was thinking the same thing about you," (Y/n) replied, her voice steady and unyielding.

"I heard stories about you, Twilight," the serpent said, her voice smooth and venomous. "The mighty hero who always carries a weapon but rarely uses it. And now, you stand here with... that?" She sneered, glancing at the dagger. "How pathetic."

 "This dagger is all I need to deal with you," she said calmly, her eyes never leaving her opponent.

Venin smirked, lunging forward with both swords. 

Her movements were fluid, almost hypnotic, as she swung one of her swords in a diagonal slash aimed at (Y/n)'s torso. (Y/n) sidestepped the strike with agility, her feet gliding across the floor like a dancer. The blade sliced through the air, missing its mark by inches.

The second sword followed immediately after, cutting horizontally toward (Y/n)'s midsection. (Y/n) ducked low, her dagger flashing as it deflected the strike with a sharp metallic clang. Sparks flew from the collision, and (Y/n) used the momentum to pivot, sweeping her dagger upward in a quick counterstrike. The serpent barely leaned back in time to avoid the blade grazing her throat.

The clang of metal echoed as Venin launched into a series of rapid attacks, her dual blades striking with speed and precision. (Y/n) moved fluidly, her dagger flashing as it parried each blow. She spun on her heel, using her smaller weapon's agility to stay close and disrupt Venin's rhythm.

"Impressive," Venin hissed, her expression darkening as her strikes grew more aggressive. She feinted a high strike with one sword while sweeping low with the other.

The serpent launched herself forward again, her twin blades moving in a blur. She alternated between high and low strikes, attempting to overwhelm (Y/n) with sheer speed and precision. (Y/n) met each attack head-on, her dagger weaving through the storm of blades like a needle threading through chaos.

She blocked a downward slash, the impact reverberating through her arm, and twisted her body to avoid the follow-up thrust aimed at her ribs. Her dagger flicked out in a quick riposte, nicking the serpent's armor at the shoulder. The serpent hissed in annoyance, her sharp eyes narrowing further.

"You fight well for someone wielding a toy," the serpent mocked, her tone dripping with disdain. "But it's nothing compared to this."

She spun on her heel, her blades carving through the air in a deadly arc. (Y/n) dropped into a low crouch, feeling the rush of wind as the swords passed just above her head. She used the opening to slide forward, her dagger flashing as she aimed for the serpent's thigh. The serpent reacted swiftly, crossing her swords in front of her to block the strike, the clash of metal ringing out like a bell.

The serpent gritted her teeth and snarled. "You're starting to annoy me."

(Y/n) smirked, her eyes gleaming with determination. "Good. It means I'm doing my job."

The serpent retaliated with a flurry of strikes, her movements growing more aggressive. She swung one sword in a wide arc while thrusting with the other, forcing (Y/n) to leap back, but seizing her opportunity, Venin lunged again, this time aiming low. Her blade grazed (Y/n)'s exposed left foot, leaving a large diagonal cut across that immediately began to sizzle and smoke as the poison seeped into her bloodstream while some of the blood began to slowly pour out. As the both of them landed with a small distance between them, the villain laughed triumphantly.

"How does it feel? Pain? That poison will course through your foot after it has numb. You'll probably lose that foot after experiencing a really excruciating pain I doubt you have ever felt in your life." she taunted, her lips curling into a sinister smile.

But to her shock, (Y/n) didn't falter. Instead, her eyes narrowed, and a faint glow emanated from her mark under her clothes that was slightly visible through her dress, but she didn't think much of it. The faint sizzling on her foot ceased as the toxin was neutralized all of a sudden.

"Looks like your poison doesn't work on me," (Y/n) said coolly, her voice unwavering.

The serpent's expression twisted into one of disbelief, and she launched