A/N: This is a Plot Bunny I cooked up, tried to write a story on, and gave up after chapter 1. It's not my cup of tea.

Basically, someone (Self Insert, an OC, someone from canon MCU, someone from other Universe) lands in Helheim. The Realm feeds him its Magic, and keeps him alive for centuries, while the MC and Hela fight each other into love.

The MC will be immortal, and if he dies, he will be revived again and again, the planet will ensure it.

This chapter is just a summary, along with some details to build the world of Helheim as an actual planet within the Nine Realms. The story takes place after Hela was banished there by Odin, but before canon time even starts. So around 1000 AD or something.

This is up for adoption, so if anyone wants, they can take it and write the shit out of it!

Enjoy!

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A man wakes up in a desolate world, with just a dark sky above him, showing a white moon. The Sun this planet belongs to is too far away to give good light, but the moons acts as a reflective surface and grants it enough light, making it an eternal full moon night.

He starts walking, to at least find a shelter and some food and water. But after hours of walking, he finds nothing. After a few days of staying hungry, with nothing to eat, and just sleeping whenever he felt like it, he falls down on the ground, too weak to go further.

When he wakes, he somehow finds his strength returned, and continues walking. This time, he finds that he doesn't feel hungry at all, despite a few days of walking without food. He keeps walking, and after a month or two of no food or water at all, he sees a palace in the distance, made of dark black stone. It looked similar to something he had seen before, but he can't remember what

Despite not being hungry, or thirsty, he wants to eat or drink something, his mind in need of it. So, he decides to check the palace out. He looks through the first few rooms, and finds nothing important. Just empty rooms everywhere. While going towards what he guesses is the Throne Room of the Palace, he keeps checking the rooms, and finds them all empty.

But in some, he finds bones of animals long since dead.

When he reaches the Throne Room, expecting it to be empty, he is very surprised to find it occupied by one person, a woman with dark hair, green eyes, and black armour with green accents. She welcomes him, and calls him fresh meat.

Before the man can even say anything, she throws something at him, and the man sees the sword for what it is, just moments before it stabs in his head.

He wakes up again, around 30 minutes away from the palace, and wonders if it was just a dream. He sits down to think about it, just staring at the Palace from afar, and finally realizes what the palace reminded him of. Asgard, from the movie series Thor.

And the woman that stabbed him reminds him of Hela, from the last Thor movie. He wonders if he's still dreaming, and gets up, once again walking inside.

This time, when Hela throws her sword at his head, the man reacts in time and ducks, but another sword cuts through his head, killing him once again.

He wakes up, and examines his head and neck, finding no mark. He stays outside for a few days, just thinking over what this means?

He's in some sort of Dark Asgard, without the ocean surrounding it, and without the Bifrost, and even without the civilian houses, with just Hela for company. He realizes obviously that he's in Marvel, but doesn't know which. Comics, or movies?

To check for a healing factor, just in case he was born with it, the man cuts his palm using a stone he finds on the ground, and the wound heals before his eyes, with a green smoke exiting out of it.

The green smoke reminds him of the smoke he had seen being emitted by the ground of the planet he's on, which makes him realize that he doesn't have Wolverine's healing factor. He just has a connection to this planet, and it is helping him survive against Hela for a reason he knows not.

Now confident of his guaranteed survival, the man once more approaches the palace, and keeps dodging Hela's swor strikes, taking it as training. Dying doesn't hurt him, but getting stabbed does. So he tries not to die, while trying to talk to Hela.

She just calls him a product of her madness, saying that she's finally gone fully crazy over the years she has spent alone. But as long as she has someone to kill, even if it is a hallucination, she will kill them.

The man keeps dying by Hela's hands, and keeps getting revived outside the Palace, like a game with the place Being a checkpoint. But with every death, he finds himself just a bit stronger, just a bit faster.

For a century, the two keep fighting, as the man keeps dying and awakening, enjoying the game with the opinion that if he is to live here for eternity, he will at least do his best to not be bored.

The planet keeps reviving him, keeps feeding him her energy, and one day, after hundreds of thousands of deaths at Hela's hands, the man manages to actually feel the magic within him, and calls it to his hands. It forms into a black sword that he uses to cut into Hela's shoulder.

He goes forward to kill Hela, but finds that she's not defending herself, and is just looking at her wound with shock, fear, and relief. She looks at him with tears in her eyes, and asks him if he's real. The man says of course he is. She just never gave him the chance of talking.

Hela says she always believed him to be a hallucination that her loneliness conjured for her, and so tried to kill him again and again. And when his body disappeared in a flash of green light whenever he died, that just made the point all the more likely.

The man says that he's not a hallucination. He just found himself here.. he didn't know how long ago, and kept on dying and getting resurrected 30 minutes out. He asks her if she still wants to kill him, and Hela just swings her sword after saying no to make him let down his guard, killing him.

The man is once again revived outside, and angry, he conjures two swords and stomps towards the palace. He finds Hela sitting on her Throne, with a smirk on her face. She says she wanted to test if he was actually telling the truth about not staying dead.

The man becomes annoyed, and says that she really has become crazy. He asks her if she has anything to eat or drink, to which she says that the planet is as desolate as they come. And while there were some animals here, she has managed to kill and eat all of them in the thousand years that she has been here.

She asks him if he knows who she is, and he says she's Hela, Goddess of Death, Queen of Helheim and daughter of Odin. Hela asks him to kneel then, if he knows she's the Queen here. The man, not even a little bit afraid of her after dying so many times, says that what's the point. She can't kill him permanently anyway.

She says she could torture him for decades without killing him, but he says that if she does that, she will still be lonely once again. And he says that he could kill himself anyway, by just conjuring the Dark Swords the planet's Energy allowed him to conjure.

Hela finally sees the swords in his hands, and asks him how he did it? She had gotten distracted by her wound the last time, so she didn't realize that he had a sword in his hand. The man says that the planet wants him alive for some reason, and keeps feeding him its Magic. After the decades that they fought, and Hela killed him millions of times, that the Magic must've become enough for him to conjure the sword.

Hela once again attacks him, saying that he's stealing her Magic, as she's the Queen of the planet, and the man defends himself, fighting her with amazing skill. These decades of dodging, and fighting, and dying had given him the time to learn fighting through practice, and even made him understand the art of fighting.

He uses his swords to fight Hela, but still dies after a few minutes of fighting.

Over the next centuries, Hela and the man keep meeting, keep fighting, and Hela begins mellowing out, giving him a few tips here and there when fighting him. She still kills him everyday, but the man keeps getting better and better, as his body gets stronger and stronger with the Magic being fed to it.

One day, after another of his Death, he just asks if they have to do it, he's tired, mentally, of fighting for no reason. Hela, surprisingly, accepts, and says that she wanted to talk to him anyway, ask him about how he came here.

The next years, they spend time getting to know each other, getting closer, while Hela still tries to get him to kneel, just for her own pride's sake. The man ignores that, and keeps training, in using the planet's green tinted Magic. It allows him to conjure anything he wants, which comes easier to him. Other than conjuring weapons, shields, and even clothes made out of the same material, he can also use it for Telekinesis, which comes out in Scarlet Witch like Magic, only green, and Energy blasts. Other than that, he cannot do anything, and even that he can do very rarely.

Hela, who has been here for a longer time than him, can conjure weapons, clothes, and also create portals to anywhere on the planet. She cannot use the Magic for Telekinesis, except for short bursts of pure Magic that send everything flying away from her. She also heals from all her wounds within moments, where the MC needs a few seconds at least.

The metal he can conjure, he finds, is something dark black, like Obsidian, but a lot stronger. It can penetrate almost anything if thrown hard enough, but it is also brittle if it is hit on the sides hard enough. However, a concentrated Conjuration can make the swords tougher. Hela can conjure weapons instantaneously, and even throw them within moments.

The next years, they spend just talking and training, with Hela killing the man every once in a while. She was doing it because she had seen that the man gets stronger every time he dies, and comes back. The man asks her not to do it, because he might not come back some day, and might even die.

Hela ignores it, saying that he's a mortal, what does he know?

During one fight, the man finally manages to defeat Hela, and holds his sword at her neck, a smirk on his lips while both are breathing hard because of the two day long fight. The man refuses to kill her, both because he has begun to like her, and because he doesn't want to be lonely. Fighting with Hela is all that he has done these years, these centuries, and he doesn't want that to stop. He doesn't want to lose Hela while banking on the chance that the planet will revive her too.

Hela kisses him, and the man kisses back, the fight being exciting enough for them to act on their feelings. Hela then kills him by stabbing him in his back, through his heart.

The next time they fight, Hela purposefully dies at his hand, devastating him. He begs the planet to revive her, despite knowing that she's not a good person, because he does not want to be lonely. When his eyes are closed, while he's praying while sending his Magic into the ground, to the planet, someone taps him on his shoulders.

He spins around, finds that Hela is back, and sees that her corpse from before has disappeared. He immediately kisses her, and tells her not to scare him again. Hela happily returns the kiss, but says that she's the Queen of the Planet, she will not die here. And even if she dies, she will always return here.

She then asks him to kneel once again, only this time with an aroused voice, and the man just laughs, realizing what she's asking him to do. He instead trips her, dropping her on the ground, and locking her arms above her head, he says that he will do no such thing. But he will fulfill what she wants to happen.

They have sex for the first time, that day, and the man realises that he might come to enjoy this planet after all.

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Niflheim: A planet with a tiny sun in the sky, two moons(yellow and red), and a blue-green sky thanks to the refraction from the white dwarf star it revolves around. A day consists of 25 hours, but it is almost always evening time. The moons revolve around Niflheim, East to West. But the Red Moon takes 9 hours to go from moonrise to moonset, and the yellow moon takes 17 hours.

The yellow moon is further away from Niflheim than the Red moon, which is seen when the two moons pass one another causing an eclipse (Yellow moon-Red moon-Niflheim). The Sun is just a blue dot in the sky, larger than normal, but still not enough to give too much daylight. The only light provided is from the reflection from the moons and from the other stars. So, 25 hour nights.

The Red Moon, however, makes winds blow out all over the planet when it is out, thanks to its gravity affecting Niflheim. The winds are fast enough to send animals, and even people, flying if they're not too heavy. So, it is better to stay in shelters when the red moon is out by itself, making everyone(MC and Hela) name that time the night time.

Land- It is a cold, almost desolate planet. The soil is black in colour, rich in calcium, carbon, potassium, but poor in nitrogen. The soil is formed because of Volcanic eruptions and the wear and tear of magma rocks. It is fertile, and has a lot of water holding capacity. The land is clay like, and can be used to make utensils and even houses. The stones are like Earth's stones, made of minerals. There's also a lot of microorganisms in the land, and a lot of hummus that make growing plants easy, as long as they're suitable for the weather.

Plantlife- Plantlife is very rare on Niflheim, and most of the plants are those already adapted to the lack of sun, and the cold Atmosphere. The leaves are dark blue, and the wood is dark brown, almost black. There are fruits, vegetables, roots, and even berries similar to what can be found on Earth, but different. A coconut like tree is also there, which forms the coconuts on branches instead of just the trunk.

Animals: Niflheim is filled with wolves, bears, eagles, tigers, lions, and a lot of wild animals. There are very few herbivores remaining, since Plantlife is scarce, but they can be found either in the few remaining forests, or underwater. Most of the animals are all predators, with a large black wolf being the apex Predator. The wolf is 10 feet tall, and there is just one large pack of it living in the largest forest of Niflheim. The wolves are descendants of Fenrir, Hela's wolf.

Aquatic life: Fishes, crabs, aquatic plants, a lot of them are available.

Water: The water is available in lakes, rivers, ponds, and even craters, but it is very cold. Only the underground water is relatively drinkable, because the rest causes brain freeze. The water has a green shine to it, because of the green skies, but it is not actually green.

The rivers all lead to a single point on Niflheim, where a giant lake resides. The lake is where all of the water to Niflheim is provided from and it is the size of an ocean. The lake contains a number of snakes, from those small enough to fit on the palm, as well as big enough to swallow any man whole. And there is a single dragon that is forever asleep inside the water, but no one dares to approach it because waking it means being eaten by it. Thanks to the presence of the dragon, the water is not as cold as the rest of the planet.

There are two moons, one a normal off-white colour and smaller than the moon from Earth, and the other a red moon that's twice as wide as the Earth's moon. The star the planet revolves around is too far(around as much distance as between Saturn and Earth), and so, it is only visible as a blue star that is bigger than normal. The sun is a white dwarf.

The atmosphere of Helheim is similar to Earth's, only a lot colder, and more humid. The cold is because of the further distance of the Sun from the planet.

Whenever fire is started on Niflheim, it comes out green because of the trace amounts of barium in the wood and air. The green fire is just as hot as the normal fire, and it can be used to cook food.

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A/N: The summary was written first, after which when I had begun writing for the story, I wrote out the world building part, so you might see some differences. You can change whatever you want in the story, if you do adopt this.

The idea came from two things, one, people wondering if Mason/Hela will happen in my story. And second, from Fantastic Four (the one in which Dr Doom is sent to another planet/another dimension.

The planet fed its energy to Doom, again and again, and made him its God or something. Same happens to this MC. I also wanted to write this story with Harry Potter as the MC, but some things felt odd when imagining Harry.

The story's future: I was hoping to have the MC develop the portals too, that Hela can create, only since he isn't bound to Helheim by Odin, he can exit whenever he wants. He goes to Earth, and brings in food for himself and Hela. They even set up a farm, where they create food for themselves.

And when Hela is eventually released from her prison, the two have a fight. Hela wants to conquer Asgard, MC knows she will fail, and the two separate. MC helps Thor and Loki defeat her, and after Loki summons Surtur, Hela still dies despite his pleas for her to flee and forget Asgard.

After Infinity War/Endgame, MC returns to Helheim, and finds Hela waiting for him, who apologizes for not listening to his warnings, and the two reconcile.

It was basically a love story between Hela and the MC, enemies to lovers lol.

I really hope someone takes this!