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:Here it is, as promised and I would like to apologize for any mistakes in advance.

Then:

She didn't get time to think much, as they all heard a loud BOOM and looked towards the desert. They didn't have to wait much as the 'metal thing' lit up from the inside out and fired beams at town and the car which it had hit, exploded.

Now:

Cassy, Thor, Neville, Erik, Darcy, Jane, Sif and the Warriors Three ran out on Main Street, and looked at the scene in a distance. A metal 'thing' was firing bolts of fire and their eyes widened as they stared at it.

Thor turned towards her and said urgently, "Cassy, you have to leave. Get everybody out of here!"

Cassy merely looked at him, arched an eyebrow and said, "Do you really think I would leave you and everyone else here to fight this thing alone and run? I cannot die, remember? But, you should leave."

Thor groaned with frustration. He forgot how stubborn she could be, along with the fact, that she was right!

"Thor is going to fight with us!" said Volstagg.

Cassy turned towards Jane and told her to take everyone and leave, meanwhile Thor walked over to Sif and the Warriors Three and said, "My friends, I'm just a man. I'll only be in the way or worse, get one of you killed. But I can help get these people to safety." He referred to the people of the town.

Knowing he wouldn't win, Thor gave up and said, "We'll need some time."

"You'll have it." said Cassy, then she turned towards Neville, they shared a look and without another word he left with Thor.

Sif, the Warriors Three and Cassy readied themselves for battle. Sif gave her a wired look, but didn't say anything. Cassy snapped her fingers and the Elder Wand slid into her hand.

Just then, the Destroyer stepped onto the Main Street and started blasting fire beams at buildings shops and restaurants.

Cassy used every spell she could remember, but nothing stopped the Destroyer. Her spells only managed to slow it down a bit, but then it started firing towards her again.

The Warriors and Sif jumped into the fight when it looked like The Destroyer won't stop anytime soon, but it knocked Volstagg out, he flew back hard and crashed into a car. Sif and Frandral tried, but were unsuccessful as well. Cassy took a deep breath when she looked at everyone around. It looked like she was alone now. She summoned her broom with a flick of her wand, it came buzzing towards her and she flew at the head of the Destroyer. She couldn't find any other way, so this was her only chance. She tried the Imperious Curse and the Destroyer stopped. She took a deep breath, but just as suddenly it started again. She tried the strongest spell she could think of and fired the blue ray, which hit the Destroyer on its metallic arm, which blew off its body and flew backwards.

Neville and Thor came back, just in time to see the metallic arm flying backwards. But it was a short-lived victory, as the Destroyer fired towards Cassy with such force, that the fire hit her broom, which broke and she fell on the ground with a loud THUD!

"Cassy!" Thor and Neville screamed simultaneously as they ran towards her.

Sif ran out and tried to get another shot but was knocked into a car.

Neville skidded to a halt next to Cassy and dropped down on his knees. He pointed his wand at her and started chanting different spells. She had a few bruises and broken bones, but she was fine.

Thor stared at her and then at Sif, who was trying to get up to fight again. He stopped her. She was already injured and he didn't want anyone to die for him. It was his fight. So, he said, "Sif, you've done all you could."

"NO! I'll die a warrior's death! Stories will be told of this day!" Sif said passionately.

"Live, and tell those stories yourself!" Thor told her.

Cassy, heard kindness and compassion in his voice and couldn't help but smile, even though she was in extreme pain.

Then he turned toward the Warriors Three and said, "You must return to Asgard! You have to stop Loki!"

"What about you?" Fandral asked.

Thor looked at them with a smile and said, "Do not worry, my friends. I have a plan."

Everyone fell back, and for once Cassy didn't argue with him. She knew this was between him and his brother, so she stayed where she was. She watched as Thor approached the Destroyer and stopped in front of him.

Thor looked where the eyes of the Destroyer were and said, "Brother, however I have wronged you, whatever I have done that has led you to do this, I am truly sorry. But these people are innocent, taking their lives will gain you nothing. So, take mine, and end this."

Cassy's eyes widened at that. She had not even imagined that he would be willing to sacrifice himself for the peoples of Earth, to save them from the destruction.

She looked as the Destroyer struck Thor and he went soaring backwards, she let out a scream of terror and she ran towards him. She couldn't imagine the thought of losing him and her heart constricted in her chest.

She kneeled next to him as soon as she reached him. He was lying in the puddle of his own blood and her eyes filled with tears.

"It's all right, it's over... You're safe..." Thor muttered lovingly, as he looked up at her.

Cassy nodded at him as she lifted his head up on her lap and combed through the golden locks she loved. "Yes. It's over. You saved us."

"I love you, Cassandra Lily Potter." Thor whispered to her with a smile.

"No… no, no, no. Don't say that. You can't leave me. You promised me forever! Please don't leave me." Tears fell as she shouted at him which fell onto his face and slowly, Thor's eyes closed and he body went still.

"No…" she sobbed as she held him tightly.

She looked up at the sky and screamed, "Noooo…!"

Her heartbroken emotions made the sky boom with thunder. She looked up and saw everyone staring at her and Thor. Everyone had tears in their eyes, but that was not she was looking at. She turned her head and saw as the Destroyer started to walk away. Fury burned deep within her as she looked back at her love, recognizing the death that was seeping around him. She was too late and she couldn't save him. He was dead! Why was she the Mistress of Death if she couldn't even save her loved ones?

Emerald eyes filled with rage turned back to the metal being. She pointed her wanted towards the Destroyer and blasted it. It flew backwards and into a building, destroying everything in its path. But it stood up soon, and twisted around as it tried to find the source which had attacked it.

Cassy was standing there, her black mane in a braid, wand in hand as she looked at the Destroyer. A spell hit it and it staggered backwards. Cassy turned and looked at Neville standing beside her, he nodded at her and together, they both fired another spell at the destroyer, which blasted half its metal leg away.

.

Meanwhile, a strong wind blew and everyone looked around.

Mjölnir came flying towards Thor and the just moment before it touched Thor, his hand grabbed it. Everyone turned towards him, as a powerful bolt of lightning struck Thor and lightning clouds swirled around him like a tornado. The Destroyer turned to watch, as Loki felt Mjölnir's power himself. The air around them cracked and the sky boomed as Thor opened his eyes and took a deep breath. They all watched as a silver armor settled itself onto Thor's body, along with the leather pants and a dramatically long red cape.

Cassy and Neville didn't look at what was happening. Years of being in a war had taught them not to turn their attention towards anything else and both blasted the Destroyer again, simultaneously and it flew back.

"Oh... my... God." Jane whispered, as she stared at Thor with wide-eyes along with Erik and Darcy.

.

Thor's hand wrapped around his Mjölnir even before he opened his eyes. He felt the power of his most trusted weapon as its power surging through his veins and he felt like he was home. The bolt of lightning welcomed him like an old friend and he felt relief which he hadn't felt since he parted with it.

He stood up and saw the Destroyer climbing out of a crater, one of its metallic arms and half the leg was broken. It started turning red like it was ready to burst, but it never got a chance, as two bolts of purple lights hit it on its torso and it was blasted back into the earth with a resounding boom.

His eyes flew the source of the lightning, as he twirled Mjölnir between his fingers comfortingly. He saw Neville and Cassy pointing their wands towards the Destroyer as they fired at it, never giving it a chance to get up. Then his focus turned on Cassy. She had a scrape running on her forehead and her left hand was bleeding, but her eyes were furious and were fixed on the Destroyer. From the pieces that were littering throughout the street, it was clear that they had been fighting it the entire time he wasn't there.

He had seen a gentle and strong lady, he was in love with; he had also seen her fighting ferociously to save her loved ones and now, he felt honored to fight alongside her as a warrior and a small smile tugged at his lips.

The Destroyer fired another beam towards him and he was blasted into the sky along with Mjölnir. The sky darkened and formed a giant tornado. Thor twirled Mjölnir and threw it towards the Destroyer.

Cassy turned and saw Thor standing there and her face lit-up with huge smile because he had been the one to create the warmth in her soul, who filled her empty life full of love and kept the fire burning in her eyes. He was her happiness. Thor looked at her and smiled back. Then with an unsaid agreement, he along with Cassy and Neville fired. Their spells mixed with Mjölnir were too powerful, as Thor flew through the flames towards the Destroyer and hit it with his hammer. As it crashed on the ground and the tornado slowly dissipated.

He flew down to the ground as Neville and Cassy too went to their friends.

"So, is this how you normally look?" Cassy asked Thor as she stood in front of him.

Thor smirked at her and said seductively, "More or less."

"It's a good look!" she whispered to him with a smile, then pulled her hand back and slapped him hard on the face, his head snapped to the side. His eyes widened along with the eight people standing there staring at them. He turned to look back at her, but her eyes were narrowed and she was seething.

What did he do?

He was still staring at her shocked, when she shouted, "You asked it to kill you? What's wrong with you? You said you loved me and then you died. Just li…"

Thor didn't give her time to finish or a moment to think, just leaned down and crashed his lips to hers. He placed both his hands on her waist and pulled her closer, calming her lips with his. She gave up and returned the kiss with equal passion, her arms wrapped themselves around his neck, his lowered towards her butt, both fighting for dominance. They stayed like that until someone cleared their throat and they pulled back.

Thor grinned at them while Cassy blushed, before he turned to this Asgardian friends and said seriously, "I would have words with my brother..."

Thor turned to Cassy and asked enthusiastically, "Would you like to see the Bifrost? You can come to Asgard with me?"

Cassy looked at him, heart beating wildly and asked, "You want me to come with you?"

"Of course, I want you to come. I want to spend my life with you." He told her as he looked into her eyes.

"Yes!" she exclaimed, as she smiled at him.

Thor smiled back as he wrapped his arm around her waist and pulled her firmly to himself.

"Wow! Easy, we haven't even had our first date, yet." she joked and Thor chuckled.

.

They arrived at the sight where the Destroyer had arrived through the Bifrost. Thor walked to the center and called, "Heimdall, open the Bifrost."

There was no answer, so he tried again, "Heimdall?"

"Loki must have done something." Frandral said.

Cassy looked at him and asked, "Could he be hurt?"

"With Loki, you never know." Volstagg answered.

Thor looked back up and shouted, "Heimdall, open the Bridge! Heimdall, we need you now!"

Suddenly, a prism colored bright light shined down on the five Asgardians and Thor looked at Cassy, alarmed.

"Nooo… Heimdall!" Thor shouted. He knew there must be something wrong, as he could feel that only he and his Asgardian friends were going back, not Cassy. He'd promised her and didn't want to leave her behind.

He was already vanishing, when the light brightened, he looked at her just in time and said, "My love, know this - while I breathe, I am yours in mind, body and soul. Please… wait for me. I will return to you."

And just like that, he was gone, and a tear fell from Cassy's eye.

ASGARD

The five Asgardians arrived, only to find Heimdall unconscious.

"Get him to the healing room." Thor ordered.

"Leave my brother to me!" He twirled Mjölnir in his hand and flew off, down the rainbow bridge, straight towards the palace.

He reached the royal bed chamber, just as his mother ran to Loki and hugged him and Loki hugged her back. His anger returned. Their father was alive. Why had his brother lied to him?

"Loki."

They both turned towards him and his mother gasped, "Thor!" She ran to him and hugged him tightly, her tears fell on his clothes.

He stared at Loki as he walked to the bed chamber and said, "Why don't you tell her, how you set the Destroyer to kill our friends, to kill me?"

"What?" Frigga asked bewildered.

Loki held his staff tightly, ready to fight and said, "Why? I must have been enforcing Father's last command."

"You're a talented liar, brother, always have been." Thor said as he stared his brother down.

"It's good to have you back." Loki said. "Now if you'll excuse me, I have to destroy Jotunheim." He fired and Thor was blasted through the golden stone wall while Loki rode towards the Bifrost Bridge, set his staff into it and directed it towards Jotunheim. It fired hitting Jotunheim, destroying it as it cracked as soon as the rays touched it.

Thor flew into the chamber and saw that Loki's staff was frozen, which concealed the energy of the Bifrost inside it.

"You can't stop it. The Bifrost will build until it rips Jotunheim apart." said Loki. Thor tried to break it, but was blasted back by Loki.

Thor looked at Loki and asked, "Why have you done this?"

"To prove to Father that I am a worthy son! When he wakes, I will have saved his life, I will have destroyed that race of monsters and I will be true heir to the throne!" Loki said as he stared at Thor.

"You can't kill an entire race!" Thor said through gritted teeth.

"Why not?" Loki looked at him and laughed. "What is this new found love for the Frost Giants? You could have killed them all with your bare hands!"

"I've changed." Thor said seriously.

Loki looked at him and whispered, "So have I!" He used his staff and hit Thor on his face and shouted, "Now fight me." Then he hit Thor again and he went flying backwards, then said, "I never wanted the throne! I only ever wanted to be your equal!"

Thor stood up, looked at Loki and yelled, "I will not fight you brother!"

"I'm not your brother. I never was." Loki growled at him.

"Loki, this is madness." Thor said. He couldn't believe this was the same brother he had left a couple of months ago. Loki looked absolutely mad.

Loki stared at him and asked, "Is it madness? Is it? Is it?" he yelled as tears filled his eyes. "Come on, what happened to you on Earth that turned you so soft?" He said mockingly. "Don't tell me it was that witch? The new Goddess of Death?" Loki sneered and, Thor glared at him. "Oh, it was!" Loki hissed as a single tear fell. "Well maybe, when we're finished here, I'll pay her a visit and enjoy her myself!"

Thor snapped when he heard those words. 'No one, apart from him was going to touch Cassandra. She was his!' And with that thought, he lunged at Loki.

They clashed in midair as they flew towards each other. They fought and the chamber shook with combined powers.

"Why so angry, brother? Don't you remember we've always shared everything? She must be really powerful." Loki said mockingly.

Thor's anger increased and he threw Mjölnir at Loki, but he blocked it and said suggestively, "She must be and quite good at other things as well. A Goddess! Imagine what we'll be able to do, if I have her by my side! Such powerful being…" Then he licked his lips and added tauntingly, "…and her body isn't quite bad from what I've seen."

Thor's rage increased, eyes burning like fire and roared, "Enough!"

He lifted Mjölnir and summon a bolt of lightning blasting Loki back and a few feet away. Then, Thor walked towards him and placed his hammer on Loki's chest, before turning around and heading back to the Bifrost.

"Look at you. The mighty Thor! With all your strength! And what good does it do you now? Do you hear me, brother? There's nothing you can do!" Loki jeered, as he tried to lift the hammer off his chest, but couldn't.

Meanwhile, Thor ignored him and looked at the Bifrost, trying to decide how to save Jotunheim. Thor extended his arm towards his hammer and it flew into hand. He closed his eyes as grief filled him, at what he was about to do, but he took a deep breath and used all his strength and smashed Mjölnir onto the bridge, which cracked.

"What are you doing? If you destroy the Bridge, you'll never see her again!" Loki shouted.

Thor cried brokenly, as his memories of his time with Cassy flashed into his mind and said in a whisper, "Forgive me, Cassandra."

Thor yelled, as he smashed the hammer over and over again, and the bridge broke apart, exploding with a loud BOOM, and flung Thor and Loki into the air. The Bifrost fell down into abyss and Loki and Thor fell towards it and into the darkness.

They stopped suddenly, as Thor looked-up and saw his father holding him and Loki was hanging onto the bottom end of his staff while Thor was holding the top.

Loki looked at their father and cried, "I could've done it father! I could've done it, for you! For all of us!"

"No Loki." Odin said and Loki's heart broke at another rejection, he just wanted to make father proud, tears fell from his eyes and he eased his grip on the staff.

Thor realized what Loki was trying to do and begged, "Loki no, please!"

Loki looked at them as more tears fell. He wasn't a part of this family. Never was and never will be! So, he closed his eyes, released the staff and fell into darkness.

"Noooo…!" Thor bellowed as Loki vanished into darkness.

Odin looked down and muttered to himself brokenly, "No…"

"Loki!" Thor screamed again, still staring into space, as his father pulled him up.

.

A couple of days later, everyone was celebrating Thor's victory and their king's recovery.

Everyone saw Thor greeting people quiet casually, after which he headed out. Frigga was standing with Sif, worried about her son. She had already lost one and it looked like she was losing another and even though she was smiling, but her heart wasn't in it. She was still mourning the death of her son.

"My Queen, I am so sorry for your loss." Sif said.

"How is he?" Frigga asked instead.

Thor hadn't spoken a word since Loki's death, she knew Sif and Thor were friends and maybe, she could tell how her son was.

"He mourns for his brother… and… he misses her. The Goddess of Death." Sif uttered quietly, her heart breaking. Everyone knew, that she had always been in love with Thor and had hoped, that he would return her feelings someday, but it seemed impossible now. She had never seen him like this. No one had, but even then, a part of her still held onto the hope. There wasn't anyway that he would be able to see her now, and she was glad about it. Maybe, he will get over her and she'll get her chance with him.

.

Thor joined his father on the balcony of the palace, who was staring at the sky.

"You'll be a wise king." Odin whispered to him.

Thor tried to keep his emotions under control, but wasn't quite successful as his voice quivered, "I will never be a wiser king than you, or a better father." They didn't speak for some time, but he continued, "I have much to learn, I know that now." Then, he paused for a breath and said, "Someday perhaps, I shall make you proud."

Odin turned towards him and put his hand on Thor's shoulder. "You've already made me proud." He said as he looked into Thor's eyes and with that he left.

.

Thor walked to the corner of the balcony. Images of his and Cassy's time filled his mind. He didn't know if he would ever see her again and his eyes grew wet. He remembered everything - her lips, her taste, her every single moan, when he'd made love to her repeatedly. It was a possibility, that she would fall in love with someone else and the thought filled him with a searing agony, imagining her in someone else's arms, her sharing herself with another, her marrying someone else, and the mere thought of it was enough to make him sick.

Tears fell and he begged, looking at the setting sun, "Cassandra… wait for me… please."

.

Heimdall was standing at the end of the bridge, keeping watch as Thor walked towards him and asked, "So Earth is lost to us..."

Heimdall didn't look at him as he said, "No. There is always hope."

Thor looked into the blackness and asked, "Can you see her?"

Heimdall couldn't hold his chuckle but answered, "Yes."

"How is she?" Thor whispered.

Heimdall saw Cassy, travelling to England, wearing the shirt Thor had been wearing the first day, when he was banished to Midgard.

"She waits for you."

Thor smiled with hope that he would see her again as his chest filled with pride, knowing that his Cassy was waiting for him. He would find a way to go back to her, no matter what!

EN: So, this was the end of Part 1. There will be two more sequels in this series, which will be different from the movies. The 2nd one, will have half of my plot, and even though I am not sure about the plot right now, but the 3rd one would be Cassy and Thor with the Avengers.

Some people asked me if Cassy is pregnant? No, she's not.

I hope you liked this one and Thank You for your overwhelming response to this story.

Sept 26th, 2018