They all headed back to the Institute and brought Alec into the Infirmary. Nyah and Clary both started to try and get Alec ready for medical treatment, but Izzy wasn't having it. She pushed the sisters out of the way, saying "Don't. You two have done enough."

Jace came to their defense, "Don't talk to them like that. This isn't their fault."

"You're right," Izzy shot back. "This is your fault."

"Isabelle!" Jace shouted at her because this wasn't helping anyone.

Izzy wasn't about to let it go. "Alec kept telling you that you were going to get hurt. You were going to get us all hurt. Now he's the one who's dying."

"Well, we needed to get the Mortal Cup," Jace justified as he helped her.

"But there were other ways to do it than to get your best friend killed!" Izzy was beyond emotional at this point.

Jace looked down before turning to Nyah. "Why don't you two go get Hodge."

Before they did that, Clary said, "We never wanted anything to happen to Alec." Then they said together, "I'm sorry." Without another word, the sisters left the Infirmary and were on their way to find Hodge.

It wasn't long before Nyah stopped. Clary didn't understand why and this worried her. "Ny? What is it?"

"You go get Hodge," Nyah replied. "I'm going back to help Alec."

Clary still didn't understand but Nyah ran back to the Infirmary before she could ask. With a heavy sigh, she went off to get Hodge.

Nyah walked back into the Infirmary and headed right for Alec. Izzy instantly blocked her path and firmly said, "I told you to stay away from him."

Nyah held her hand out towards Alec as she said, "Even if I have a way that could help him?"

Izzy didn't like the thought of this one bit but if Nyah could help him, then so be it. She stepped aside so Nyah could do her thing.

Nyah walked over to Alec and pulled the glove off his hand.

Meanwhile, Jace asked her, "What are you doing?"

"Installing a safety net," Nyah answered then held out her hand to Jace. "Give me a knife."

Izzy stepped in to intervene. "You are not cutting him!"

Nyah didn't have enough time to explain. "We can argue about this while Alec keeps getting worse or you can shut the hell up and let me try to save him!"

Jace didn't say a word and handed over a knife.

Nyah quickly took it and sliced the Gemini symbol onto Alec's palm before doing it to her own. She winced loudly then clasped her hand with his. Her cat-like eyes glowed as she said the words, "Jūsu asinis ir manas asinis. Mans asinis ir mūsu asinis." Which translates to, 'Your blood is my blood. My blood is our blood.'

After speaking these words a glowing aura surrounded their hands and a burst of energy shot out from it. Nyah almost collapsed but Jace caught her and eased her onto the bed next to Alec's. "I'm okay," Nyah assured him. "The more I use it the easier it gets."

Izzy went to check Alec's hand and saw a Gemini Mark branded into his palm. "What did you do?"

Nyah breathed deeply as she explained. "I anchored him to me. If help doesn't get here in time and he dies...he will come back like I would have." She just left out the part where if Alec did die...then Nyah would die forever.

Jace kissed her forehead and whispered, "Thank you."

Nyah smiled then looked over at Izzy when she heard her say, "I'm guessing that explains why Magnus called you his Nyah."

Nyah nodded. "Yeah. Gotta love blood spells." She laughed then felt a bit woozy. "I think I need to lay down for a bit."

Jace helped Nyah into bed and was about to cover her up but she fell asleep before he even had a chance to.

Nyah was unconscious until she awoke with a strong gasp because she felt something was wrong with Clary. At that same moment the whole Institute started to shake.

"Someone just went through the Portal," Izzy informed them.

"It was Clary," Nyah interjected as she got out of the bed. "I have to protect her."

Jace wasn't about to let her go anywhere. "If Clary was the one who went through the Portal you have no way of knowing where she is. The best thing you can do is stay here until you know where she is."

Nyah was about to argue with that but didn't get a chance to get a word in.

"I'll check it out." Jace kissed her cheek before grabbing his coat and rushing out of the Infirmary.

Nyah wanted to follow but she didn't. Jace had a point – if she didn't know where Clary was then there was nothing she could do.

It wasn't long after Jace left that a cloaked man entered the Infirmary. Nyah knew who it was instantly. "Dad." Nyah rushed over to him and hugged him. "I'm so glad to see you."

Magnus hugged her back, saying, "I came as soon as I heard." He went over to Alec and the first thing he saw the was brand on his hand. "Nyah...what did you do?"

"I anchored him to me," Nyah answered, even though she had a feeling he already knew that.

Magnus couldn't believe what he had just heard. "If Alec dies of anything but a natural death then you will die in his place. There is no coming back from that, my Nyah."

Nyah understood the risks and did it anyway. "I know."

"We better work quickly to save him." Magnus handed a list over to Isabelle. "I'm going to need all of this. Lots of it."

Izzy handed the list over to Simon. "Take this." Now addressing Nyah, she said, "Come on."

"I won't let either of you die," Magnus vowed to his daughter and watched as she ran off with the others.

As Nyah hurried on with Izzy and Simon, Simon asked, "Did you just call him dad?"

Nyah sighed, "It's a long story, Simon. Just roll with the punches. It'll be a hell of a lot easier if you do."

Simon was going to say something else but there wasn't much of a point since there were more pressing matters at hand, so he just kept quiet and kept up with them as they ran.

Izzy led the way into the basement where all the medical supplies were stored. After taking the list from Simon, she started loading up his arms with the items.

While this was going on, Nyah gasped because in the next room down the hall...she saw her mother. "Si – Simon?"

"What?" he asked as he adjusted the jars in his hand.

"Am I hallucinating right now?" she replied, pointing down the hall.

Simon walked over to see what she was talking about and his eyes went wide. "You're so not hallucinating."

With that confirmation she pulled her cellphone out of her jacket pocket and instantly dialed Clary. "Clary? You're never going to believe this but...we found Mom. She's here, in the Institute." Nyah was going to say more but her battery died out in that moment. "So much for details," she muttered to herself, putting her phone away.

Nyah left Simon's side and went over to her mother. "I'm here, Mom. Both my parents under the same roof as me, so to speak, that hasn't happened in a while." She reached out and touched Jocelyn's hand. "Come back to us, Mom."

Izzy walked out of the medicine room and took the jars and bottles from Simon. "You two stay here. I'll be right back."

Simon wasn't sure why they were being left behind but he wasn't going to be left alone, so he didn't dispute it. And of course Nyah wasn't about to leave her mother if she could help it.

The sound of screeching tires and men shouting caught their attention. Nyah and Simon went to the small window to check it out and each jumped a little when a partially turned Werewolf landed in front of it and growled before taking off.

"The Werewolves are here to save us," Simon said to Nyah and Jocelyn. "Never thought I'd say that."

Nyah walked away from the window and back over to her mom. "Like I said before, we live in a freaking Underworld movie."

There was a rattling at the door and they assumed it was Isabelle but soon discovered that it was not. Nyah recognized them as the men that attacked Luke and wanted to rip their heads off but she didn't even have a chance to react before Simon was pulling her into the medicine room.

"Simon!" she quietly hissed but he clasped his hand over her mouth and pulled her back into the shadows with him in hopes of them not being discovered.

Nyah tried to get out of Simon's grasp but somehow he was stronger than he used to be. Either that or she was still weak from the anchoring. Either way, she couldn't get out of his arms even as Valentine's men carried her mother off with them.

When they were gone, Simon let her go and Nyah pushed him. "Why did you do that! I could have stopped them!"

"And risk dying again?!" Simon shot back. "You were unconscious a few minutes ago, Nyah. You really think you're up for taking those guys on?"

Nyah opened her mouth to argue with him but found that she couldn't. "Dammit," she said to herself before walking out of the room with Simon right behind her.

They walked down the hall and through the doors to find Izzy being surrounded by crows that soon morphed together into a Demonic creature. "Run!" she shouted at them. Izzy killed the Demon that tried to attack them.

"Where are we going?" Simon asked as they ran.

"There's another exit," Izzy replied then had to stop and pull Simon and Nyah out of sight because there were men on the other side of the door.

When they saw a shadow coming towards them, Nyah whispered to Izzy, "I got this." Her eyes turned cat-like and when the figure was close enough she conjured some magic and slammed whoever it was against the wall as she held the magic in front of their face. Thankfully she realized it was Luke before she did anything with it.

"Nyah!" Clary exclaimed when she realized it was her.

Nyah pulled her hand down and returned to normal. "I almost freaking killed you!" she shouted, backhanding Luke's arm like she was scolding him or something.

"Wouldn't be the first time," Luke replied, handing over the knife she had thrown back at the Hotel Du Mort. "Nice throw by the way."

Nyah took the knife and put it into her inner jacket pocket. "Sorry about that."

Luke smiled. "No need."

Nyah smiled back then went over to her sister to check in. "Are you okay? What happened?"

"Valentine's my father," Clary whispered, making Nyah gasp, "What?"

Their conversation was interrupted by Izzy warning Luke and the other Werewolves, "The Institute is full of Demons."

"That's impossible," Luke retorted. "The Institute is hallowed ground."

Simon scoffed incredulously. "Yeah, well, no one seems to have told them that."

"Someone on the inside must have let them in," Izzy explained. It was the only possible explanation.

Just then a Demon seemed to come out of nowhere and pulled one of Werewolves off with them. The other Wolves started to turn and Nyah readied herself with magic.

One by one the Demons were plucking off the Werewolves. "Move back!" Izzy shouted, guiding them away. "This way!"

The small group of them made it into the room at the far end of the hall and managed to close the doors but the Demons were fast approaching and approaching hard. It wouldn't be long before they broke down the doors.

Even Nyah had to admit that this would be too much for her to handle. "One or two I can take on but this...I don't know, Clary." She looked at her sister and made something clear, "But I will protect you, whatever it takes."

As soon as Clary heard those words it was as if something inside her just clicked. Almost as if she knew it was her time to be the one to protect her sister. As if in a daze, Clary reached over and took Izzy's Stele from her boot. She then proceeded to burn a Rune into the palm of her hand.

Nyah watched this as it happened but didn't really know what was happening. "Clary?"

"Step away," Clary said to those in the room, especially those near the door. "Step away!"

Luke and the other Werewolf ran away from the door and once they did, the horde of Demons burst through. Clary held up her hand and a glowing burst shot out before dissipating, something that froze the Demons where they were.

Nyah almost couldn't believe her eyes. "Holy Piper Halliwell." Looking at her sister in awe, she asked, "Clar...how did you do that? I can't even do that."

Even Izzy didn't know how to explain it. "Clary, which Rune is that?"

Clary answered both their questions. "I don't know. I just..."

Izzy cut her off. "I've never seen it before. It's not in the Book."

"Thanks for saving our asses," Nyah said to her sister with a relieved chuckle then noticed the Rune on Clary's hand was losing its color. "Clary, it's fading."

As the Rune started to fade, the Demons slowly started to get their movement back. "Let's get out of here, yes?" Nyah pointed forward and was the first to make their way through the obstacle course of the Demon horde, all the while humming the Mission Impossible theme song.

"Are you seriously humming that right now?" Simon couldn't believe it and yet he could.

Nyah just chuckled a little and walked through the doorway out of the room. It wasn't too long after that the others followed suit.

Izzy handed Luke on of her Blades, saying, "The Demons are coming in through somewhere. I'm going to stop them." She used her other Blade to snap off a chain around a the gate to the armory and went in to get a flamethrower. After coming out she looked at Simon and Nyah, "Come on."

Nyah wasn't going to go anywhere without Clary so she took hold of her hand while Luke said, "Go. We'll catch up." The sisters didn't waste a moment and took off to catch up with the others.

They ran upstairs as fast as they could and stopped when they could see where the Demons were entering through. Clary and Nyah saw more than that, they saw Valentine in the Library kneeling beside their mother who was unconscious, lying on the sofa.

The sisters looked at each other and nodded, silently agreeing upon a plan while Simon and Izzy went up to the Dome to keep the Demons from coming in.

Nyah had Clary stay behind her as they snuck into the Library. She pulled the knife from her jacket pocket and once she was close enough, she held it to Valentine's throat. "She's not going anywhere with you, you son of a bitch."

Valentine assumed that this was Clary. "How did you get up here?"

"I have a pretty powerful sister," Nyah answered and pulled Valentine back away from Jocelyn. It was then that he saw Clary standing nearby.

"Twins?" Valentine couldn't believe it. "That's impossible." Suddenly, it hit him, "Gemini."

Nyah didn't acknowledge it one way or the other. She just pressed the knife closer to his throat and ordered, "Let's go."

Clary saw that Jace was going towards them and shouted, "Behind you!"

When Nyah turned to see, Jace pulled the knife from her hand. "What the hell, Jace!"

Jace pointed at Valentine. "Just listen to what he has to say. It's not what you think."

Nyah saw Clary coming over to her as she said to Jace, "You don't know what I'm thinking right now."

Valentine looked at the three of them, saying, "Finally, all my children together. I believed only to have two, but to have a Gemini daughter...is more than I could have dreamed of. My daughters. And my son."

Nyah addressed what he said about being his daughter. "I am not your daughter!" she seethed then what he said next sunk in. "Son?" She looked back to Jace and took a sharp inhale. "No...no." She couldn't believe it. Not after what they had done. She just couldn't.

Jace couldn't even look at Nyah in that moment. "I'm so sorry, Nyah. I didn't know. I swear I didn't know." Even if Nyah didn't have Valentine's blood in her veins, she had Jocelyn's and according to Valentine...so did he.

Clary looked between them saying, "Valentine is lying. Luke said that our brother is dead. He died in a fire and they found his remains in the ashes."

"I took Jonathan with me when I ran," Valentine interjected. "The bones were of a child killed by wolves."

Jace looked at Nyah in that moment, he had to. "I wish it wasn't true."

"It's not...it can't be." Nyah couldn't even begin to describe what she was feeling in that moment.

"She doesn't want to believe you," Valentine said as he approached, "because she's in love with you Jonathan."

"Shut up!" Nyah shouted as tears streamed down her face. "Just shut up!"

Clary felt so horrible for her sister and couldn't even imagine what she was going through right then but she caught something that Valentine had said that could disprove what he was claiming. "I thought your name was Jace."

Once more, Jace couldn't even look at Nyah. "Jace is a nickname."

Clary gasped when she put it together. "Jonathan Christopher. J.C." A flash of memory entered her mind of her mother holding a box with those initials on the lid. Clary brought her hand to her mouth, "Oh my god."

Valentine, still believing that Nyah was his daughter despite what she had said, went over and tried to comfort her.

Nyah shoved him away from her. "Stay the hell away from me!" She couldn't even think straight. Nothing was making sense to her and honestly, right then, she didn't know how she was going to get through it.

Clary went over to her sister and held her tight. There wasn't anything she could to make things better, this she knew, but being there for her was the least she could do.

Finally Nyah couldn't even take being touched by even her sister so she pulled away and walked as far off as she could.

Valentine took this moment to go over to Clary. "I can take her pain away, make her forget about all of this. All you need to do is take out the Cup." When Clary didn't move, he forced her face down to the table. "Take out my Cup! I want the Cup!"

Nyah reacted instantly in that moment, her obligation to protect Clary kicking in at full power. When her eyes changed, shot out her hands and threw Valentine away from her with her magic. Nyah had every intention of killing Valentine right then and there.

Valentine saw how her eyes changed and knew that she was telling the truth – she wasn't his daughter. Only Warlock blood could do that to a Gemini. There was no need to feel anything for her now. When she charged toward charged, he pulled a throwing dagger from his belt and threw it right at Nyah.

Nyah took in a painful gasp when she felt the dagger enter her abdomen.

"Nyah!" Jace shouted but didn't rush to her side because he believed she'd come back. So instead, he went to the pentagram made of weapons and pulled out one of the spears, canceling out the spell that was used to summon the Demons within the Institute. "Enough." With the spear in hand, Jace made the first attack against Valentine.

Clary ran to her sister as Jace and Valentine started battling it out and knelt down beside her to try and stop the bleeding. "You're going to be okay." She tried to be convincing but her tears were streaming down her face.

Nyah raised her hand towards the table where the tarot card was kept and used her magic to bring it to her. Once it was in her hand, she pressed it against Clary and whispered, "There – there's a replica." Nyah managed to get that out before death took her once again.

Clary didn't need more details than that. She knew exactly what Nyah was saying and while Valentine was distracted, she took off to get it.

Nyah's Gemini Mark finally kicked in and revived her. It took longer than before – probably due to her anchor with Alec – but whatever the cause, at least it worked. Just like before, she needed some time to process what had happened and when her body finally stopped trembling, she pulled herself up to her feet.

Nyah saw Clary holding the Cup into the Portal and Valentine trying to reach in and get it but failed.

Clary wasn't surprised that Valentine couldn't reach the Cup. "If you'd been a real dad, you'd know me well enough to imagine where the Cup is, where my deepest thoughts are taking it. You don't know the first thing about me. You're not my dad...And you never will be."

While Clary was talking to Valentine, keeping his distracted, Nyah made her way closer to the Portal. She had an idea but needed to be close enough to do it so Clary wouldn't get caught in the crossfire.

Valentine looked right at Clary as he said, "I promise, you'll never have to see me again."

Clary saw Nyah approaching and saw the signal to get away but didn't acknowledge her because she couldn't risk Valentine seeing, so she just pulled out the Cup and handed it over to Valentine before backing away from him and the Portal.

Valentine was so taken with the Cup that he didn't realize what was going on. "Thank you, Clary. Without this Cup, we are lost."

"Not 'we'," Clary replied and Nyah added in as walked into view, "You." With a full force of her magic, Nyah threw Valentine back into the Portal.

Clary ran to her sister and sighed in relief. "You did it."

"I want to see for myself," Nyah replied and walked over to the Portal to make sure there was no sign of him within it. She then turned around when she heard Jace grunt and saw that he deactivated the summoning spell again. As they looked at each other, it felt like the first time all over again – completely captivated.

It was because of this moment – this distraction – that Nyah was taken off guard. Valentine's arms shot out through the Portal and grabbed onto her in an attempt to pull her in with him. Nyah screamed when this happened and couldn't really move her hands to get off some magic to stop him.

Jace and Clary both ran to her and grabbed on, holding her tight.

"Don't like go!" Nyah cried.

"Never!" Jace swore then addressed Clary. "My Stele, drive it into the Portal!"

Clary took Jace's Stele from his pocket and with a a strong thrust, drove it into the Portal like he said to.

When Clary did this, Jace pulled Clary out of the way then got Nyah out of Valentine's grip as the Portal started to freeze over, with Valentine's arms sticking out of it. Valentine's fists clenched then the Portal started to crack and seconds later, it exploded shooting shards of ice outwards.

The three of them hit the deck, Jace instinctively using himself as a shield to protect Nyah. When the blast from the Portal subsided they all looked up to find that the Library was covered with ice and snow. It was almost as if it was snowing inside as well.

Jace looked at Nyah and gently brushed some snow from her hair. "Are you alright?" he asked her softly.

Nyah wasn't sure how to answer that. "I don't know." And with that, she got to her feet, helped Clary up, and went over to their mother.

The girls crouched down next to Jocelyn and Clary was the first to speak. "I understand why you did what you did. And I forgive you. I want you to know...your secret's safe." Clary reached into her inner jacket pocket and pulled out the Mortal Cup tarot card. She handed it over to Nyah, saying, "It's safest with you."

Nyah took the card and slipped it inside her own inner jacket pocket. "I'll protect it with my many, many lives."

Now it was Nyah's turn to talk to their mother. "Clary's not the only one who understands, Mom. I get it. I get what you did with me. I love you, Mom...and I forgive you."

After Nyah said that, the girls saw Jocelyn's finger move and believed that she was going to be alright.

The sisters cried as they leaned against each other, looking at their mom. Now that they had her safe, all they had to do was wake her up.

The girls, with Luke, brought their mothers to the hospital. Jocelyn was stable but since the doctor's didn't know what she took they'd have to wait and see in regards to her waking up. Finally Clary convinced Nyah to head out and get some rest. Nyah was too tired to put up a fight and while she didn't want to leave her mother's or Clary's side, she wouldn't be much use if anything did happen. And Simon had stopped by the hospital to check in and see Clary, so Nyah wanted to leave them alone for whatever conversation they were going to have.

Nyah went back to their apartment after leaving the hospital. She was thinking about everything that had happened, including anchoring herself to Alec. He survived the Demon wound but Magnus wasn't able to reverse the anchoring. If Alec ever died of anything 'unnatural' – basically anything other than a 'Mundane' illness or accident, or old age then Nyah would die instead – permanently. Nyah knew that was a possibility when she did it but there was just something inside her that made it happen.

She thought about this and more as she started cleaning up their apartment. Finally she was done with the 'Mundane' method. "I'm not a freaking Mundane," she said to herself and shook out her hands before using her magic to put everything back in its place and mend what was broken.

Nyah was just putting the final pieces in place when Jace appeared in her doorway, saying "I like what you've done with the place."

Upon hearing his voice, she whipped around and crossed her arms. "Being a Gemini has its perks."

Jace walked into the apartment as he said, "Nyah, we're afraid you're not coming back."

"If Clary decides to come back then I'll have no choice but to follow," Nyah answered, not able to look at him.

"If you did have a choice all of your own?" he inquired, still walking towards her.

Nyah didn't have an answer for that. "I don't know. It's so hard to be around you right now, after what we did...I'm so stupid."

"You're not," he replied. "It's hard for me as well, but this is about more than us. You have incredible gifts, Nyah, and we need you." After a moment he added in, "I need you."

Nyah looked at him when he said that, she couldn't look away. Every fiber of her being was telling her to say yes but it was all so confusing. "I don't know."

Jace wanted to lean forward and rest his forehead against hers, but stopped himself from doing so. Instead he said, "Remember when I said I had never seen an Angel?" When Nyah looked at him and nodded, he said, "Well, I lied."

Nyah scoffed a chuckle at that. "I'm half Warlock, Jace. There's nothing Angelic about me."

Jace disagreed with her there and this time he couldn't stop himself from resting his forehead against hers. "Yes, there is," he whispered before walking away. Before Jace walked out the door, he turned around to say, "You're still the bravest Mundane I'd ever met," then left.

Nyah needed a moment to process being so close to Jace then uncrossed her arms with an incredulous scoff. "I'm not a freaking Mundane." Saying those words to herself again made her decision for her. There was no way she could go back to living a Mundane life now, or even something that resembled one. Yeah, Jace was a complication but it was time for her to finally make a decision of her own...so she did.

Nyah quickly grabbed her bag and placed it on her shoulder as she hurried down the stairs in hopes of catching Jace before he left. When she walked out the front door, she found him leaning up against his motorcycle.

With a grin on his face, he said "You took your time."

Nyah threw her hands out to her sides a bit. "I'm exhausted from dying a million times and overusing my magic. Give me a break." She was teasing him as much as he had just teased her. "You said you needed me, and since this whole Shadow World is the one I was created for, I guess I can tag along."

Jace got onto his bike with a chuckle as Nyah sat down behind him. He noticed her checked on the Cup's tarot card to make sure it was secure in her pocket. "Make sure you keep that safe."

"I will," Nyah assured. "Whatever it takes." She was about to wrap her arms around him so they could take off but wasn't sure she should. "This is harder than I thought it would be."

Jace turned around to face her. "I don't believe it, Nyah. It doesn't feel like the truth, not in my heart – not in my soul."

"I don't believe it either," Nyah replied and found herself to be telling the truth. "I don't."

Jace smiled when he heard her say that and took her hands, bringing them around his torso so she'd hold onto him.

Without thinking, Nyah tightened her arms around him and leaned her head on his back, saying, "This feels like some star-crossed fairy tale."

Jace found himself smiling again when she said that and after turning on the motorcycle, he said, "Remember what Hodge said?"

Nyah lifted her head to look at him better. "What?"

Before taking off down the road, Jace turned to face her with a bit of a smirk present upon his face. "All the stories are true."

End Part 5 - The End

A/N: Hey readers! We've reached the end of The Opposite and The Mirror: Movie Edition. Hope you enjoyed it!

For those who are interested in the Shadowhunters TV show adaptation of The Opposite and The Mirror, here's the link:

s/12225881/1/The-Opposite-and-The-Mirror

Thank you all for reading! It was fun writing this and thank you to that Anonymous person on Tumblr for daring me to do it XD.