FULL SUMMARY: It all started when King Runeard killed the Northuldra leader, setting up the chain of events that led Iduna to Agnarr and that eventually led them to their daughters. But darkness has been setting on the horizon for years, gaining strength until it is time for the real battle to begin. Pitch Black has waited for far too long and has already been defeated once without an army. He doesn't plan on losing again, especially without backup, and the heroes in this tale don't plan on letting him win.

But Fate does not know the outcome of the future. The future is always changing with every decision made. However, it was Fate that brought these strangers together. Strangers from all over the world. Now it is up to them to be sure that the darkness doesn't tear them apart.

But when Agnarr and Iduna's eldest daughter, Elsa, is exposed, who should everyone be more afraid of? The Nightmare King or the Snow Queen?

A.N: This is a BIG AU Crossover story with characters from movies that you probably think are stupid/weird to add (such as Fiona and Artie from Shrek for example) but I promise it won't be stupid. Please give this story a chance. I'm begging you haha. Anyway, on with the show.

Our tale begins long before the birth of many of our heroes. In fact, it begins with the parents of two sisters. In the Norwegian kingdom of Arendelle, deep within the woods and far from the castle walls, as north as one can possibly go, lies an enchanted forest. And within that forest resides the Northuldra tribe. The Northuldra are Arendelle natives and while they are not people born of magic, they use magic in their every day life. The forest that they have lived in for centuries is protected by four elemental spirits: Water, Earth, Fire, and Air.

Respectively, they take the form of a water horse, a rock giant, a salamander, and a breeze that holds onto a few leafs, giving it a type of visual form. As one, the Spirits and Northuldra have lived in harmony, and when they came in contact with an Arendellian King who had promised peace and gifted them with a bridge, both the Spirits and Northuldra welcomed them with warm hugs and bright smiles, happy to have new friends and allies.

But you see, the Spirits of the Forest are not the only magical beings in the world. I myself am a magical being, a very ancient one I should add, and on that dreadful day...there was another ancient one with me. I did not know of his presence, not until it was too late and he made himself known.

The Arendellian King, King Runeard, was consumed with fear, fear that was increased by this other ancient, and because of his fear, he killed the Northuldra leader. It was his plan for months, to kill off the Northuldra tribe, and only few of his soldiers knew of his plan. Some nearby Northuldra saw the murderous act and attack the royal soldiers without question. A battle broke out and it angered the spirits. I've never seen them so angry before.

King Runeard died, but his son, Agnarr, who he had brought with him to 'celebrate' the official alliance with the Northuldra, was saved after being knocked out. He was saved by a Northuldra girl named Iduna, who called to the Wind Spirit to help get him and her out of the forest, away from the violence.

I followed them, making sure that they were led to safety, and watched as the Wind had set them inside an empty cart and blew them away, into the direction of the kingdom. I prayed that the journey back would be easy, and continued to watch as Iduna covered herself with the blanket that was available in the cart, so she wouldn't be seen by Agnarr or the kingdom's civilians, and I knew that as Mother Nature, it was my duty to watch over her, the now orphaned girl. I had planned to continue following them, to make sure they gotten to Arendelle with no trouble, but I was stopped when the other ancient revealed himself.

"Ah violence and fear," his voice had said from behind me, sending shivers down my spine. "Isn't it beautiful? Or does it not compare to the beauty of nature? I must say, King Runeard's fear of the magic that the Northuldra live with was quite...delicious."

I had wanted to attack him right that second, but I knew that he was expecting it, so I had willed myself to stay calm. "How typical of you," I had snapped, whirling around to face him, and when I did I was not at all surprised to see that his appearance was still the same as it was centuries ago since the last time I saw him. "To destroy something so wonderful with your darkness."

He had laughed at me, showing his sharp teeth, and said: "Oh Tara, you know as much as I do that darkness needs to be shown in order to reveal the light."

"And what," I had hissed, taking a step toward him and clenching my fists, "is the light you wish to reveal, Pitch Black?"

He had shrugged as he made his way toward me, circling around me like I'm his prey, and said, "A break from boredom. Me causing him to give in to his fear was just a little bit of harmless fun. I'm sure your fellow Guardian, Jack Frost, knows a thing or two about fun times. I'm surprised you didn't bring him with you to such an event. I'm sure he would have had a blast."

"He was needed at the Pole," I had said, feeling protective of the boy who I viewed as my own son. "And harmless fun, you say?! People died today, Pitch! They died because of you!"

He had stopped circling me, standing directly in front of me with a smirk painted on his face. It had took every inch of me not to slap it off. "Oh, Tara," he had lifted his hand to caress my cheek, the act catching me so off guard that my eyes had widened and I had pathetically froze, "people die everyday. La Muerte knows that first hand."

"Speaking of hands," said the voice of my dear friend, another ancient like Pitch and I, "I suggest you get yours off of her."

La Muerte had stood behind Pitch, and when he had turned around to face her, revealing her to me, I could see the fire burning in her eyes, even from the distance that she had stood at. "You've already caused enough trouble today, Pitch," she had said to him, coming our way. "I suggest you stop and move along."

She had stopped directly in front of him, just as close to him as he was to me the moment before, showing no fear, and Pitch...well he had laughed at her. "Nice to see you too, Holy Death. What brings you here?"

La Muerte had growled and I knew she had wanted to slap him too. "I'm here because of all the death activity my globe had picked up on. Death that you brought! And now, because of you, the survivors are trapped inside the forest!"

"What?!" I had breathed out, shocked to my core, and it as in this moment that Pitch decided to leave.

"Always a downer you two are," he had said with a sigh as he had stepped away from us, "Well, it was nice catching up with you ladies. Tis a shame the fun didn't last any longer, but alas, I have better things to do than be scolded and to worry about trapped people in the woods. Until next time." And with that, a cloud of black sand had surrounded him and his form fell into a glittering black shadow on the ground, vanishing right before our very eyes.

With no hesitation, I had looked up at my friend and said: "What do you mean the survivors are trapped?"

La Muerte had frowned and slightly turned. "Come and you will see."

And so, I had followed her back to the forest's entrance, not sure what to expect, but definitely not expecting to see a thick fog covering one of my most beloved places.

"La Muerte," I had said to her, my eyes never leaving the fog, searching for the four elemental stones that were nowhere to be seen. "What...what is this?"

"I was hoping you'd tell me," she had said as she placed a comforting hand on my shoulder. "Tara, I watched as some of the people tried to run through it, to escape, but...they were pushed back by some kind of force. A magical wall within the fog. It won't let them leave, and it won't let anything else enter, not even a rock. It will only answer to magic."

"So we're able to enter then?" I had asked, observing the fog some more.

From the corner of my eye, I saw her nod. "Si," she had said in her native tongue, which translated to yes. "Surely you can fix this, right? This is the Elemental Spirits' doing. You are Mother Nature. You made these spirits ages ago. If anyone can fix this, it's you. They'll listen and answer to you."

I understood why she had thought that, but she did not fully understand. "No," I had answered with the shake of my head. "It's not that simple. They are their own beings who make their own decisions. I may be their Mother, but I am not their master..." I had paused to take a step forward, reaching my hand out to the fog, "But I am their friend too."

And with that, I had stepped into the mist.

But the mission had failed. The Spirits...

They were nowhere to be found.

It's like they were never there to begin with. As though they never existed. Their absence and the scared people trapped inside broke me into tears, and with there being nothing for us to do, La Muerte and I had reluctantly left, heading for Arendelle in hopes that we'd catch up with the heir and his savior. When we did, the rest of the journey was held in silence; the boy unconscious, the girl still hidden under the blanket, and La Muerte and I invisible to them because we did not want to be seen.

Unlike our fellow Guardians who need believers to be seen, La Muerte and I, Life and Death, can choose who sees us and who doesn't.

When we had made it to Arendelle, the cart had stopped in front of the palace gates. The guards had immediately taken action upon seeing their unconscious heir, but they did not check under the blanket and left the cart unattended after getting their heir inside. Iduna did not hesitate in jumping out of the cart and running into the town, running and running until she found herself in the woods, her only source of familiarity.

Her only reminder of the home that I knew she was trying to return to.

That's when La Muerte and I made ourselves known to her. We introduced ourselves, calmed her down, and told her of the fate of her people and home. However, we did not tell her of Pitch and how he influenced the former King of Arendelle to kill her leader. She had already gone through too much, and I did not want to sadden her even more.

"What do I do now then?" She had asked as her eyes filled with tears. "I-I don't know where to go. My family is...How...how will I..." but she had cut herself off to wipe away the fallen tears that stained her cheeks.

"Oh, mija," said La Muerte before she had bent down to the girl's level. "Everything will be okay. We can't meddle too much with humans, but we will make sure you are settled before leaving."

"Yes," I had agreed, bending down to her level too, "there's an Orphanage that will take very good care of you. You'll have a roof over your head, a nice bed, three meals a day, and friends to keep you company. You'll be safe, Iduna. I promise."

She was silent for a moment, looking at us with beautiful blue eyes, searching our own eyes for any sign of a lie, and when she saw none, she had nodded her head and said in a quiet and defeated voice: "Okay."

We had led to her to the orphanage, where she told the head mistress that she was washed ashore, a lie we had told her to tell, and after her explanation, the head mistress welcomes her inside. Iduna was still hesitant and when she looked back at La Muerte and I, I had wanted nothing more than to bring her back to Moonhaven with me, where she could live among the Leafmen. But we could not meddle anymore than what we already had.

La Muerte and I had smiled kindly at her, and while Muerte waved, I had gestured for her to go inside. Iduna had smiled back, mouthing thank you, and walked through the open door, entering the next chapter of her life, a life that I had secretly watched as the years went on until it no longer was a secret anymore. You'll find out how that happened soon though.

Originally, after leaving her with the orphanage, I wasn't going to check up on her. Not once. Not ever. I was going to let life just...live on. But I eventually gave in to my desire and finally went to see her again, invisible of course, and when I did, I was surprised to see that she was already best friends with the young king of Arendelle. It had warmed my heart seeing her with the boy she had saved, but it made me wonder if he knew that she was his savior.

It was a question, however, that I knew I would never be able to ask and receive an answer to. That is...until I finally revealed myself to her when she was seven months pregnant and took her on quite the adventure. That's when my "spying" was no longer a secret. But it's like I said earlier, you'll find out soon enough what I mean. There's a lot you're going to find out.

Anyway, life went on after that moment I saw her playing with Agnarr as children, and every so often I would not only visit her, but also her home, the Enchanted Northuldra Forest, making sure that the people inside were doing okay. Since there was nothing I could do to help the tribe and remaining soldiers, I felt it as my duty to watch over Iduna and Agnarr for them, the two children who I knew were part of something big. I just didn't know what.

I remained their watcher, their Guardian, mainly for Iduna since she didn't have any guards like Agnarr did, and watched as the pair grew older, fell in love, got married, coronated, and of course...I was there for the birth of their children. She saw me during her first pregnancy, but in total she had two, in which I remained glamoured for the second. The two sisters that I mentioned before? They are their daughters, and it is the eldest who plays a big part in this story. A very big part.

But of course, I said too much.

I'll let you find out the rest for yourself.

A.N: Characters

Queen Tara: Epic (2013)

La Muerte: Book of Life (2014)

Pitch Black: Rise of the Guardians (2012)

Please comment and tell me what you think!