Disclaimer: I do not own Harry Potter or the Thor series. They belong to their respective authors. I am writing this just for fun and no money is being made.

AN:I would like to apologize for any mistakes in advance and would request you to please be patient with me.

America

Their jet arrived on the helicarrier which was floating on the Atlantic Ocean. As soon as she exited the jet, Natasha saw Agent Coulson and Steve and went to them.

"Agent Romanoff." Coulson nodded at her and then introduced, "Captain Rogers."

"Ma'am." Steve greeted courteously.

"Hi." She nodded back at him.

"Is he here?" asked Coulson. Natasha turned around along with the two and saw Cassandra and Banner coming towards them, both inspecting the area curiously.

Natasha turned towards Coulson and said, "Coulson, they need you on the bridge, they're starting the face trace." Coulson nodded and with that he left without a word. Then she looked at Steve and said as they started walking, "It was quite the buzz around here, finding you in the ice. I thought Coulson was going to swoon. Did he ask you to sign his Captain America trading cards yet?"

"Trading cards?" Steve asked flummoxed, while Cassy and Bruce shared a glance at that.

"They're vintage." Natasha told him. "He's very proud."

They walked over, stopping in front of Cassy and Bruce. Bruce shuffled awkwardly, while Cassy stared at the man, recognizing him from the file she'd been had an athletic body build, blue eyes and blonde hair – perfect image of an American hero. He reminded her of Thor and she took a deep breath as she pushed that thought aside because right now, all she needed was to focus on how to get Neville and the others back.

"Captain Rogers. I'd like you to meet Cassandra Potter and Dr. Bruce Banner." Natasha introduced them to Steve, who shook their hands and greeted, "Dr. Banner. Miss. Potter."

"Oh yeah, hi." Bruce said as he shook Steve's hand. "They told me you would be coming."

"Word is you can find the cube." Steve told the man, even though it was more of a question.

Bruce looked at him with a grimace and asked, "Is that the only word one me?"

"Only word I care about." Steve answered truthfully. Then he turned towards Cassy and asked, "And you're the witch?"

Cassy shrugged uncomfortably and instead asked as she motioned around them. "Is it strange for you? All of this?"

Just then a group of soldiers trotted by and Steve answered, "Well, this all actually kind of familiar."

Natasha walked over and said, "You might want to step inside. It's gonna get a little hard to breathe."

Suddenly, they heard the floor clacking and it started shaking. "Is this a submarine?" Steve asked as the three looked around.

"Really? They wanted me in a submerged, pressurized metal container?" Bruce sighed.

They walked over to the edge and saw four massive jet engines and turbines churning the water as they ascended up into the air and took-off.

"No, no. This is much worse." Bruce murmured.

Natasha led them inside the helicarrier, which obviously was huge. There was a circular elevated floor, along with a large glass table with chairs, overlooking the view of the whole room along with the agents working on countless computers. Fury turned around and greeted them. "It's good to see you again, Miss Potter. I see that you were successful."

He said with a glint which she didn't like. So, Cassy didn't reply, just stared at the man statically. She didn't like the way he treated people, ordering anyone he wished.

Fury didn't wait for her reply, instead turned to Bruce and said, "Dr. Banner, thanks for coming."

Bruce shook Fury's hand and said sarcastically, "Thanks for asking nicely." He asked as he looked around, "So, how long am I staying?"

"Once we get our hands on the Tesseract, you're free to go." Fury told him.

Cassy turned towards Natasha and saw her leaning down to a computer screen which had a picture of Clint. She frowned as the idea hit her. "Why didn't I think of it before?" She exclaimed suddenly, startling everyone along with Fury, Bruce and Agent Coulson. She turned towards Natasha and asked urgently, "Do any of you have a personal item of his?"

They all looked at her with a frown as Natasha asked, "Yes. I do have his watch. Why?"

"Maybe I can find them through it. I tried to track Neville but he blocked me as soon as they left. I can cast a locator spell on any personal item of his. I'm not sure if it'll work, since they're so close to the Tesseract. It's extremely powerful and I'm not sure about it. And if Neville hadn't cast any warding spells." She finished as she racked every single spell she had ever known in her mind.

She felt as if her brain was splitting in half as she moaned in pain, even though she was still concentrating on the watch in her hand with all the magic she could muster. The power of Tesseract was so strong, that she wasn't able to locate anything, no matter how much she tried. Fury, Natasha, Bruce and Steven were in the private office, where they had been for the past hour.

"You should take a break and try again later." Bruce said as he saw her grimacing in pain.

"No. I'm almost there." She muttered, now focusing on the power coming from Tesseract. 'Maybe this would work.' She thought as she tried harder. Something was stopping her, but she wasn't about to give up. Neville needed her and God knows what Loki would make her do!

She cried out in pain at the same moment a few drops of blood fell from her nose and she clutched the watch harder.

Fury, Steve and Natasha stared at her with alarm and she moved to help Cassy, but before she could reach her, Bruce was there. He held her shoulders, shaking her and said authoritatively, "Stop it! We'll find them sooner or later!"

Cassy's eyes flew open and she slumped on the chair she was in, gasping for breath.

Natasha gave her a glass of water along with a box of tissues, just as Bruce asked, "Are you alright?"

She nodded in thanks to Natasha and grimaced with pain when her head bobbled. She gulped down the glass of water and said breathlessly, "They're in Stuttgart, Germany."

Cassy was fuming silently as Fury waited for his men to confirm the location. She could understand that the man hadn't dealt with her kind before and couldn't put blind faith on her, but why would she lie when her friend was being controlled by a maniac God. She would have left them behind, but what good would that do? She won't be able to face Neville and Loki together if it came to it. She needed all the help she could get. Especially now, when she was spent after using all her energy in tracking.

"Captain…" Fury called and everyone looked up at him as he said, "…you're up."

Steve gave a single nod and said, "Let's go, guys!"

She was still feeling weak but stood up to go with the others, when Fury stopped her. "I think you should stay here, Miss. Potter."

Cassy's head snapped towards him, eyes narrowed, "Excuse me?"

"You located the Tesseract, but we don't know for sure if your friend is with Loki or not. What if he comes here while you're in Germany?" Her jaw clenched and she stared at the man, but Fury wasn't finished as he continued, "And not to forget that he wanted you to join him. We've seen that it's easy for him to control anyone and we don't want you in his clutches because he's definitely planning something. I cannot take that risk." He told her in a steely voice as he motioned towards Steve to leave.

Steve and Natasha took one look at the two and left without a word.

She glared at him and spat at him angrily, "Not to be disrespectful, Mr. Fury, but Loki isn't your common criminal that could be handled as you wish. You're dealing with a God here, who is far more powerful than anything you might've encountered until now. You just might need all the help you could get because you've no idea how powerful he is or what he can do." She turned around to leave, but she stopped as she looked into his eyes and said, "And if you, even for a second, think that you can order me around, I'll show you exactly why people are scared of me." Her voice was soft and deadly calm as he finished and with that, she left without a backward glance.

Natasha was flying the Quinjet, heading back towards the helicarrier after they captured Loki from the art museum in Germany; while Steve and Tony were in the back, keeping an eye on Loki. The only sound that could be heard was of Fury on the radio as he asked Natasha, "Is he saying anything?"

Natasha replied, "Not a word."

"Just get him here. We are low on time." Fury commanded.

In the back, Steve whispered to Tony, "I don't like it."

Tony asked sarcastically, "What? Rock of Ages giving up so easily?"

"I don't remember it being ever that easy. This guy packs a wallop." Steve muttered as he looked at Loki.

Tony looked at Steve and said, "Still, you are pretty spry, for an older fellow. What's your thing, Pilates?"

Steve looked back and asked confused, "What?"

"It's like calisthenics. You might have missed a couple things, you know, doing time as a Capsicle." Tony said jeeringly and Steve frowned, annoyed and shot back, "Fury didn't tell me he was calling you in."

Tony groused, "Yeah, there's a lot of things Fury doesn't tell you."

Suddenly, the night sky which had been dark and calm until now, rumbled and boomed with thunder through the clouds.

Natasha checked her belt as lighting lit up the sky, crashing close to the jet. She looked around and asked, "Where is this coming from?"

The energy shook the jet as it flew and they all looked around. Steve saw Loki fidgeting in his seat, looking edgy and asked, "What's the matter, scared of a little lightning?"

Loki looked at them and replied while looking up, "I'm not overly fond of what follows..."

They felt another thunderous boom, so strong that it shook the jet and they felt something landing on the roof. The sky lit up even more with thunderous bolts. Tony was the first to react as he put his helmet on which snapped into place, while Steve put on his mask hurriedly.

Steve looked up when he heard Tony pushing the buttons which opened the rear hatch and asked, "What are you doing?"

Instead of answering, Tony walked towards the door intent on dealing with the threat, but as soon as he reaches towards the door, a man with blonde hair and red cape flew in and landed on the floor. He had a hammer in hand as he stood up and stepped further into the jet. As soon as Tony moved his arm up to fire, he was knocked back by Mjölnir and flew back onto Steve, crashing them both on the floor.

Thor didn't pay attention to the Midgardian's, instead did what he was here for. Ripping Loki's seatbelt off, he grabbed his brother by the throat and flew out into the night sky without another look backwards.

"And now there's that guy." Ironman complained, looking out.

Natasha looked back and asked with a frown, "Anther Asgardian?"

"Think that guy's friendly?" Captain America asked as he stood up from the floor.

Ironman looked at Steve and Natasha as he replied, "Doesn't matter. If he frees Loki or kills him, the Tesseract's lost."

"Stark, we need a plan of attack!" Steve called when he saw Tony moving towards the exit.

Tony didn't stop, but replied before flying out, "I have a plan – attack!"

Steve and Natasha shared a look as Steve sighed, frustrated before grabbing a parachute.

"I'll call for help." Natasha told him before he too jumped out and she picked the radio to contact Fury.

Thor dropped Loki on a mountain, where he crashed on his back and grunted with pain, but started laughing as soon as he heard Thor landed perfectly on his feet beside him.

Thor looked at his brother and asked without wasting another moment, "Where is the Tesseract?"

Loki laughed even more as he took deep breaths and grunted, "I missed you too."

Thor looked at him vexed and asked, "Do I look to be in a gaming mood?"

"Oh, you should thank me. You're finally here because of me. Your precious Earth! It's someone else who's precious, huh?" Loki asked cheekily.

Thor put the Mjölnir down, pulled Loki up roughly, but held his brother's head with care and whispered, "I thought you dead."

Loki looked at him emotionlessly for a couple of seconds before asking, "Did you mourn?"

"We all did. Our father..." Thor started but Loki held up his finger, stopping him mid-sentence. He pushed Thor's hands away from him and shouted, "YOUR father! He did tell you my true parentage, did he not?"

Thor looked at Loki, bewildered. He felt like this person wasn't his brother, but a stranger. "We were raised together! We played together! We fought together! Do you remember none of that?"

"I remember a shadow, living in the shade of your greatness. I remember you tossing me into an abyss, I who was and should be king!" Loki spat.

Thor asked bemused, "So you take the world I love as recompense for your imagined slights? No, the Earth is under my protection, Loki!"

Loki laughed at that and said, "And you're doing a marvellous job with that! The humans slaughter each other in droves, while you ideally threat. I mean to rule them. And why should I not?"

Thor shook his head at his brother's arrogance and asked, "You think yourself above them?"

Loki pretended to think for a second but then responded, "Well, yes."

Thor was perplexed with the change he saw in his brother and stated, "Then you miss the truth of ruling, brother. A throne would suit you ill."

Loki gritted his teeth angrily. "I've seen worlds you've never known about! I have grown, Odin's Son, in my exile! I have seen the true power of the Tesseract, and when I wield it..."

Thor didn't listen more and asked urgently, "Who showed you this power? Who controls the would-be-king?"

Loki shouted, "I am a king!"

Thor held him by his biceps tightly and yelled back, "Not here! You give up the Tesseract! You give up this pointless dream!" Then he looked into Loki's eyes and added desperately, "You come home!"

There was a pause as Thor waited for Loki's answer, but when he got one, it wasn't what he had envisioned coming from his brother. "...I don't have it." Loki told him softly, but his voice was strong.

Thor lost all self-restraint he had and conjured Mjölnir, trying to threaten Loki, but stopped when Loki continued, "You need the cube to bring me home, but I've sent it off, I know not where. But you know, I'm here for something far more interesting. The Mistress of Death. Her power is unlike anything I've ever felt before. It's… intoxicating, just like she is." Loki added lasciviously.

Thor growled as thunderbolts lit up the sky. "Do not talk about her!" He threatened dangerously as his eyes flashed with fury.

"But its so unfair! I've met her, you see and she's lovely. Befitting Queen for a King!" Loki motioned towards himself and continued, while Thor's grip tightened on his Mjölnir. "We'll rule the nine realms together. She'll be by my side… and in my bed." He licked his lip mockingly, just as a bolt of lightning hit the ground, right beside him.

Thor pointed Mjölnir at him and said, "Listen well, brother. I..." But before he could finish, he was knocked-off the mountain by Iron Man who tackled him into the forest below them.

Loki said mockingly, "I'm listening."

Thor crashed on the ground while Iron Man landed a couple of feet away from him.

He got up and warned the man, "Do not touch me again!"

Tony's mask slid away, revealing his face and he replied, "Then don't take my stuff."

"You have no idea what you are dealing with." Thor told him.

Tony looked around and said mockingly, "Ah... Shakespeare in the park?" Then he added in the most atrocious English accent, "Doth mother know you weareth her drapes?"

Thor looked at him, beyond irate and tried again, "This is beyond you, metal man. Loki will face Asgardian justice."

"He gives up the Cube, he's all yours. Until then, stay out of the way, tourist." Tony told him as his mask slid back in place.

Thor snorted, then threw his Mjölnir at the metal man, who crashed a couple of feet away like a rag-doll.

"Okay." Tony muttered as he sent a blast of fire towards Thor, knocking him into the trees. He stood up and looked at Loki, who was now observing the fight, looking highly amused. Thor raised Mjölnir in the air, summoning enough power as he felt electricity cracking around and building inside it. He pointed the hammer at the man in front of him and hit him square in the chest. Tony grunted as he felt his armour cracking with impact.

Jarvis informed him, "Power to four-hundred percent capacity." And he blinked. "How about that?" He murmured to himself, impressed and fired high power beams at Thor, who flew back and collided with a tree.

Tony flew at Thor as they both fought, flying throughout the woods, leaving everything destroyed in their wake. They landed on the ground, where Thor held Ironman by his metal wrists and crushed them with his bared hands. With no option left, Tony headbutted Thor, who in turn smashed his head back and Ironman flew back. Tony opened his palms and fired a blast, just as Thor summoned his hammer and threw it at him, but instead of colliding with each-other, they crashed into an invisible wall.

"Always in trouble, aren't you?" They heard and their heads swivelled towards the voice.

Thor knew that voice, could recognize it anywhere as he stared at his beloved standing on a rock.

"Cassy."

He breathed her name in a whispered awe, to make sure that she wasn't a fragment of his imagination. She looked exactly as he remembered, but at the same time, she was more beautiful than ever. Her black hair were whipping with the wind, green eyes glowing as she looked right back at him. She lowered her shield along with her wand and gave him a blinding smile and he couldn't do anything but stared at her with wonder. In that instant, everything melted away and the only thing that remained was her. He didn't notice the man that descended beside her, he forgot his fight with the metal-man, his eyes were only for her. He felt a sense of completion just by her presence, merely looking at her gave him a serenity that he never even knew he was missing and seeing the same love reflecting back at him that he knew must be shining in his own eyes, filled him with happiness beyond imagination.

When Fury called her that they needed help somewhere in Europe as someone has taken Loki, Cassy had no idea that she'll be seeing Thor again. It took her a moment to get her bearings down, when she saw him in front of her, fighting with Ironman. He was as glorious as she remembered, but she was sure that her memory didn't do him justice. His hair was longer, but he was still the same and she had to remind herself that he had been gone only for a year, even though it felt like years to her. As soon as his eyes met hers, she felt warmth filling in her soul. His eyes were so full of love when he looked at her, that she felt her heart skipping a beat. She felt a burning in her eyes and realized that they were rapidly filling with tears.

Tony looked at the girl, who couldn't be more than 20. He saw Captain landing beside her and only lowered his mask when it registered to him that she wasn't another threat. She was staring unblinkingly at the alien when he cleared his throat and asked, "Not to offend you or something, but what are you doing here kid?"

Cassy and Thor didn't know how long they were standing there, staring at each-other, until Tony interrupted them. She blinked, turned her head towards Ironman. She had read his file and to say that she was impressed would be an understatement. The man was a genius, but he didn't matter right now. All that did was her love standing right in front of her, who she'd never thought she'd be able to see again. She ignored both the men and flew down from the rock, landing perfectly on her feet. She took the last few steps and threw herself at Thor with all her might, who in turn caught her and crushed her to him. She tucked her face into his neck, breathing in his scent, while he closed his eyes and did the same. He pulled back and cupped her face in his palm, looking at her like she was something precious, which she was to him and touched her lips with his. The floodgates opened when they felt the familiar electricity flowing throughout their bodies. They forgot their audience and surrounding and what they were here for. The only thing mattered was that they were finally together.

Meanwhile, Ironman and Captain were watching perplexed, wide eyes and mouth slacked. Loki, on the other hand was fuming.

Steve finally cleared his throat which gained the couple's attention, they looked at him but stayed in each-other's arms. "So, I take it you know each-other?" he asked awkwardly at which Tony snorted.

Tony looked at the girl closely and frowned. He recognised her from the file Fury had given him on Banner, Rogers and Potter along with her friend. He was still unable to believe that there was a whole different world of witches and wizards, who existed alongside them. He had tried to search for Cassandra Potter or any Potter for that matter, but there was no record of her anywhere. It was as if the girl didn't exist, no birth record, no schoolwork or information. He couldn't find anything about her or her world, apart from what Fury had provided him with.

"Shall we discuss the matter at hand now that we've had this lovely union?" he asked sardonically.

Steve who had finally come out of his shocked state after seeing that the witch apparently knew the man, so maybe he wasn't a threat. He was here on a job and he wasn't going to take any chances, so he braced himself and stated in an authoritative voice, "We don't know what you plan on doing here."

Thor released his hold on Cassy and took her hand before he told the man irritated, "I've come here to put an end to Loki's schemes!"

"Then prove it! Put the hammer down." Steve challenged.

"Um, yeah, no! Bad call! He loves his hammer!" As soon as Tony finished, Thor knocked him with the hammer and he flew back by the force of it.

Thor released Cassy's hand and took a step towards Steve and bellowed threateningly, "You want me to put the hammer down?"

Her eyes widened with disbelief when she saw that the two were getting ready to fight again. Her eyes went to Loki, who winked at her and she scowled at him. Here they were fighting for Loki, who looked more entertained than he should've been. He could've left easily if he wanted to, but he was still here, which meant that it was deliberate on his part. She conjured a shield as soon as Thor leapt at Steve, which knocked them both back as soon as they collided.

She narrowed her eyes at the three men as she deadpanned, "Okay! Are you done?"

Thor, Captain America and Ironman stood up slowly, staring at her with dumbfound expressions.

She looked at both Steve and Tony, and told them earnestly, "He isn't the threat." She still had her wand in her hand as she took quick glance at Loki, noting that he was sitting there and frowned. Then she narrowed her eyes at them and scolded, "Now, if you would you stop behaving like neanderthals for a second, you might realize that Loki is an extremely powerful individual, who could've escaped easily while you were busy having a showdown!"

They all stiffened and their heads snapped towards Loki, who merely smiled at them innocently. They all looked sheepish for a second, before Thor flew up while Steve followed, to retrieve the prisoner.

Tony peered at her in disdain, scrutinising and asked, "Aren't you a little too young to be fighting…?"

Cassy arched an eyebrow at that and shot back, "Aren't you a little too old to be flying inside a metal…" she waved her hand towards him as she deliberately said the word, "contraption?"

Tony stumbled back, gasping as if he'd just been hit and stuttered, "Con – contraption?! This isn't a contraption! It's an armour! And I'm not that old!" To emphasise his point, he raised his arms to show her his suit.

She couldn't hold herself and burst out laughing at the incredulous look on the man's face, while he pouted and pointed his finger at her in an accusatory manner, "You're evil!"

Thor, Steve and Loki found them like that, her laughing and Tony pouting. Finally, she calmed herself when her gaze landed on Loki, who's hands were now tied with manacles. He looked at her lecherously as he licked his lips and whispered, "Powerful, beautiful and intelligent. You'll be perfect."

Thor's temper flared, as did Cassy's. He pulled his hand back and punched Loki square in the jaw, while Cassy hexed him at the same time. The sound Loki made was something between a pained groan and a yelp as he fell on the ground. Thor took her hand, holding it tightly, even though his eyes never strayed away from his brother.

Cassy took one look at Thor and gulped, knowing how tough it might be for him. She turned to look at Steve and Tony who were both staring at her with their jaws slackened and wide-eyes. She took a deep breath and said, "We need to go."

They had to get their friends back. Loki was scheming and they needed to know what! And on top of everything, the way he had looked at her earlier, had sent chills sown her spine. He had definitely panned something huge and she just knew that they didn't have enough time.

EN: I am so sorry for the late update guys. There's nothing more to say than 'life happened'! I'll try to update sooner this time, and I hope you're still with me.

Now, I wasn't able to answer any of your questions, so here it is. First, this is short story as well and have 5 chapters. Second, there won't be a love triangle between Thor/Cassy/Bruce. This story's main focus is on Thor/Cassy. And I would be glad to answer anymore questions that you might have.

I had you had a lovely New Year! 😊

Jan 28, 2019