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The Immortal Shadowhunter

Summary:

Centuries passed after the passing of Alexander Lightwood who was killed in battle after fighting with his boyfriend, Magnus Bane. A favor between a demon and an angel gives Alec a second chance of life as the only immortal Shadowhunter. A second chance with Magnus that had been ripped away from the both of them.

Notes:

Hello everyone, I hope that you all enjoy reading this fanfic. This is my first multi-chapter fic for the ship, but I'm looking forward to getting this story going! The tags are going to be updated along the way, but please way attention to them in case of triggering content. Anyways looking forward to seeing your kudos and comments! <3

Chapter 1: The Death of Alec Lightwood

Chapter Text

It was a fight that Alec didn’t want to have, but one that ended up happening despite how awful he felt about it afterwards. Another stupid fight dealing with their differences because of the tension that had been there among the Shadowhunters and Downworlders lately. The feeling of regret was there after he had been kicked out of the apartment by Magnus because of the anger that lingered in the air. He wanted to fix things, but he knew that Magnus wasn’t going to let him back inside the apartment that easily. Giving him space was all that could be done right now until the both of them had a chance to cool off as they both said things that they did regret. The Lightwood sibling wanted to fix things with Mangus, he figured that a nice dinner and getting away from the Institute for a few days would help. At least, he hoped that it would for both of their sakes. He didn’t want to lose Magnus, he loved him too much to let that happen. 

He just needed to get through this day first because of his duties as a Shadowhunter and the head of the Institute. His presence was needed while the recent issues of demonic activity has picked up causing chaos around the streets of New York. The source behind the demonic activity hadn’t been discovered yet, it was becoming frustrating as Alec didn’t know what to do next. He was trying to figure that out, but the answers weren’t coming easily. Whatever this demon was, it was smart and obviously invading anyone who came looking for it while still causing havoc. The destruction that this mystery demon already cause was growing bigger each passing day, it was unknown how long this could stay hidden before the mundanes were going to take notice. Alec wanted nothing more, but to stay home and avoid the problems happening inside of the walls of the Institute. He couldn’t though, the only place that he could hide at was in his old room just in case he ended up staying there because of his duties as a Shadowhunter. 

People were already wandering among the halls of the Institute dealing with the daily Shadowhunter duties plus the missions that they had to deal with. Alec just hoped to avoid a crazy day since his day was already starting off bad because of the fight with Magnus, a fight that probably was going to make him moody for the rest of the day. Until he is able to make up the fight with Magnus if he can get the warlock to listen to him, that will have to wait once he is able to get away from the Institute for the rest of the night. A small breath did escape from the brunette before he moved to make his way to the office to see what paperwork would be waiting for him on his desk. Paperwork that Alec wasn’t really looking forward to going through especially since his thoughts were going to be elsewhere, thoughts that most likely would be focused on Magnus and their fight. 

 

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The day went by slowly, too slow for Alec’s liking while he was waiting to hear anything from Magnus. The messages that he went to the warlock so far have gone unanswered, he didn’t want to push on the matter, but he wanted to hear back from him. It wasn’t a big surprise to him if the mood that was looming over his head had been picked up on by the rest of the Institute. Throwing himself into the work was all that Alec could do to avoid snapping at anyone that might enter his office, he didn’t want to throw his anger at anyone else. There was enough tension already lingering around the Institute because of the issues dealing with the presence of this demon, he would of asked Magnus to help, but that obviously wasn’t going to happen. He doubted that he would be able to get help from another warlock, especially one that might know what kind of demon this was. It could of been a new one or one that hadn’t been seen in centuries, Alec really didn’t know as the books he looked through came up with nothing. No leads to figure out what kind of demon it was, the creature was just a complete mystery and probably going to stay that way. All that he could do was hope that something would help him figure out what this demon was, it would help find a way to defeat it depending on what its weakness is. 

That was when the familiar sound of the alarms started to go off telling Alec that there was danger, danger that needed to be taken care of. The feeling in his gut was telling him that this attack most likely was the demon that they were trying to stop, the entire Institute needed to be prepared for whatever was going to come next. A plan needed to be put together to deal with this demon as Alec was running everything through his head about what could be done to take it down. It needed to be stopped before there would be anymore loss of life, this demon has already taken too much already and it was unknown how many more people were going to die because of it. It was going to be stopped here and now. 

The scene was in complete chaos already as the demon had already made its face known flying through the air over the streets of New York. Its wings were large with sharp teeth and claws that could easily tear into anyone if they weren’t paying attention to what the creature was doing. The demon knew how to use those claws and teeth to fight besides the other abilities that it had, abilities that easily could stop the Shadowhunters that had followed Alec here. If the demon could be pinned down then it might give them the advantage needed to bring it down as quickly as possible, they had to be careful though. There was going to be a fight on their hands as stopping the demon was the only thing that was important to him right now while the determination was there to return to Magnus. He was going to return to Magnus and fix the issues behind the fight that they had earlier. 

Of course, Alec second guessed himself. Everything went wrong though, the demon was too strong with just the numbers that he had brought figuring that they could take it down. Oh, how wrong he was. 

Maybe if Magnus was there then they would of had the advantage to defeat this demon. If only Magnus was there to help and give Alec the chance to share everything that he wanted to say. 

 

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Voices and cries of pain filled the air as the demon still lingered in front of the group of Shadowhunters that were attempting to take it down, many had been lost already though. Alec was one of the many that was laying among the rubble feeling the pain from the injury that rested against his side, one that was caused by the claws of the demons. Breathing was becoming difficult as he could feel the poison that was running through his blood, poison that could kill unless help came in time. Help wasn’t going to come though, Alec knew that as the only thing that he wanted was to see Magnus one last time. See him and apologize, but that wasn’t going to happen. 

With a shuddering breath, he closed his eyes accepting his fate like how many Shadowhunters before him also did

“I’m sorry, Magnus... I won’t be coming home...”

Everything just fades away afterwards as Alec let out one more breath passing underneath the screams of pain and battle. Words left unheard to the one that he loved, the one that would of been waiting for him to make an appearance back in the place that they both called home. A home that Alec loved from the moment their relationship became real. 

Alexander Gideon Lightwood was dead.