The servitor had just finished building up the fire again when Anna heard the door open.
"Anna? It's me, Elsa," said Elsa as she pushed the door open the door of the Winter Palace.
Anna scrambled to make it look as though she hadn't been camped out in more or less the same spot for the past few days. "So you've decided to come by, have you?"
Elsa walked in and seemed to pay little to no mind what was around her. "Anna, Kristoff and I have some things we need to talk to you about."
"Like how you and he have been sleeping together?" Anna asked in an accusatory voice. It was a shot in the dark, she knew, but when Elsa blushed a scarlet red she knew that she'd hit home.
Her heart broke at that, but she pressed on anyway. "Just admit it; you've been trying to steal him away ever since I introduced you to him!" she cried from the balcony where Shadow had built the fire.
"That's a lie!" cried Elsa indignantly and a flurry of cold began to blow around her. "Half of the things we did together we did because you forced us to!"
"Anna, Elsa hasn't been trying to steal me away," said Kristoff as he slipped inside.
"And so the betrayer enters," cried Anna as soon as she spied Kristoff.
"Anna I haven't betrayed you," said Kristoff as he approached the staircase leading up to her.
"Each time I've seen you over the last few days you two have been hanging off of each other all the while, hugging and clinging to each other like lovers! What else would that mean but a betrayal?" asked Anna as she retreated to the magic mirror. The servitor stepped forward to stop her but stopped when she raised her hand to him.
"Anna, you've been cooped up in your room with that thing the last few days! The only time we saw you was when we were at dinner with Lord Derek's folk and even then you were only down there for a moment. What on Earth are you talking about?" asked Kristoff as he moved to stand next to Elsa.
It was Anna's turn to blush now. "I was watching you with my magic, so don't deny it! I saw the way you were fawning over him at that fencing thing and how you both crawled all over each other at dinner! I could even hear you speaking! You kept going on about how you wanted to be together with my Kristoff and what I would say about it. Well I heard you, and my answer is no!" Anna set her hand against the mirror and sent a blast of raw shadow magic down at Elsa.
Elsa raised an ice shield on instinct and was amazed to see much of Anna's attack roll off of it, though that part that impacted it rocked her backwards and cracked the ice Elsa had raised.
Anna howled in frustrated rage and a surge of dark shadows spread out from where she stood. She raised her hand again, now totally covered with an inky black shadow, and sent another blast of power down at Elsa.
This time it totally cracked the ice shield Elsa had raised and sent Elsa herself spiraling to the ground. Anna let out a triumphant whoop. "See Elsa? I'm stronger than you, deadlier than you and soon I'll be much more beautiful than you. It's hard to love a corpse, after all."
"Anna," whispered Elsa as she saw Anna raise one last blast of shadow magic and hurl it at her. She didn't try to block this time, wanting this wretched conflict with her sister to just be done.
It was amazing to everyone, then, when the shadows cleared to reveal that Elsa had not been harmed by Anna's attack at all.
Anna stopped moving, torn between her confusion at her rage towards her sister and both a desire to see her suffer more than anyone had suffered before her. She jerked her head towards the door when she heard it creak open.
"Is everything alright in here? Only I just heard a bit of yelling and wanted to be sure your talk was going well," asked Lord Derek as he poked his head in.
Anna screamed and sent a blast of shadows at him. He pulled the door shut to block them but he needn't have bothered as the shadows tore them off their hinges and sent them sprawling into the ravine behind them.
Elsa readied a mesh of raw ice magic while Kristoff stood off to the side, unable to aid or hinder either side, but Anna ignored them. She pulled a deep well of shadow magic from the mirror and then leapt from the balcony to where Lord Derek lay as he tried to push the remains of one of the doors off of him.
"Stay out of my family's business, you fowl little man," Anna said as strutted up to him, unharmed by the jump. She raised her arm and let the shadows surge out from her fingertips and flow into Lord Derek.
His shock at her actions was soon overcome by the horror of whatever the shadows were doing to him. His eyes turned black as Anna's shadow magic filled him and he opened his mouth to let out silent scream, unable to even speak a coherent thought anymore.
"Now where was I?" Anna asked as she turned back to Elsa. "Oh yes. I remember," she said as she called up another ball of shadow magic and threw it as hard as she could at Elsa.
This time, though, Elsa was ready. As soon as it got close to her, Elsa called up a curved wall of ice and watched as the shadow splashed against it, first splitting and then reforming into a ball of shadow that left a large gash in the floor in front of it.
Anna sneered at Elsa and tried to leap back up the balcony. However, much to her embarrassment, she found out that without the power boost from the mirror she could jump no higher than anyone else could. When she made a dash for the staircase, Elsa waved her hand in front of her and Anna found that where the staircase had been there was now a smooth sheet of ice while the mirror itself was surrounded by a barrier made of ice.
"So you're not content with just Kristoff now, you have to take away everything else that's mine as well?" asked Anna, near tears.
"She hasn't taken anything from you, Anna. I'm yours, I promise, but Elsa is dear to me now as well," said Kristoff, gently pulling Anna into his embrace from behind her.
Anna tried to fight him off, but the mountain man's grip was firm around her. "Let me go, you betrayer! I don't want your pity, I don't want anything you have to give me secondhand!"
She managed to push him away, but he just spun her around and gripped her shoulders. "Anna. I wouldn't give you pity. You're better than that. I only give my love, wholly and unabashedly."
She tried to fight him off again only for Elsa to come up to her and embrace her. "Anna, we love each other, but only because you brought us together in that special way of yours. Why on Earth would we want to turn around and hurt you now?"
Anna was torn. The rage that had filled her up before was subsiding, but she still didn't trust either of them. She'd spent too much time over the past few days feeling her hate grow to just let it slide away. "Kristoff, if you love me and I mean really love me, then you'll let me look and make sure."
"Do what you need to do," said Kristoff as he stepped back to let her take a look at him.
Anna knelt on the ground and once she found a good spot of reflection, willed her power into it. It was harder without the mirror to guide her, but somehow it felt freer as well. She focused on Kristoff and, just as she had with Lord Derek before, dove into his mind to find the line that lead to his love.
As she expected, there was a brilliant trail that lead back to Elsa. Images of shared glimpses flashed through his mind and a night spent making love flared up and Anna sobbed. She almost broke contact when she noticed another trial just as brilliant that lead to her. She focused on it and found every moment of their romance replying in her mind. Dreams of Kristoff's and her potential marriage floated up to her at first, soon joined by dreams of marriage between Kristoff, her and Elsa as well.
She didn't know when the images finally stopped flowing into her, but when she came to she found Elsa and Kristoff holding her in an embrace between the pair of them.
"We love you, Anna. We've always loved you and we always will. We just want to share that love between all of us now," said Kristoff to her softly.
"Please let us back in, Anna. I don't want to lose you again," said Elsa, near tears herself.
Anna nodded adamantly. The rage and hate was gone now and in its place was a brilliant love that she'd thought was gone forever.