Pretty One

Ao3 Link

Square Filled: soulbond

Ship: Magnus Bane/Alec Lightwood

Rating: G

Tags: Shadowhunterbingo, mermaid AU, soulbond Demonic Merman Magnus Bane, powerful Magnus Bane, Shadowhunter Alec Lightwood, Prince of Edom Magnus Bane

Summary: Curiosity was always a weakness of Magnus'. Curiosity for what humans would do if they caught him and curiosity for this pretty new human.

Created for shadowhunterbingo

Chapter 2

Alec slowly rubbed a towel against his hair, unable to stop from staring into the mirror in his bathroom back in the Institute. His once unmarked chest was now marked with a golden handprint, a wedded handprint that belonged to the demonic merman he had met a few days ago.

Alec had left his encounter with the merman out of his report when he finally had made it back to the Institute that night; he had left a lot out if he was being honest. This was something personal and he didn't want anyone knowing what this mark meant until Alec sorted out what it meant to him.

Oh, he knew all about soul marks and soul bonds, he had seen Jace's appear when he met Clary and that alone had felt like a sword in the chest but he was happy for his Parabatai. He was even happy his little sister had found her' in Clary's mundane-turned vampire friend Simon. Alec had seen soul bonds form and he had seen them shatter when one half died and he had seen people together whose souls were not meant for each other.

He saw the love and the pain of soul bonds in equal. He had been unsure he ever wanted one once Jace got his from Clary, but now that his soul bond with that beautiful merman was staring him in his face Alec couldn't deny he had truly wanted this. He had wanted someone who was meant for him, to be the other half of his soul.

What was making Alec question everything was the fact his soul mate was very obviously a demon from Edom, a powerful one at that from the display of power he had shown to save them both that day in the tank. Alec set the towel down and traced the outline of the golden handprint, he had never seen or heard of a golden soul mark, but he also had never heard of a Shadowhunter being bonded to a demon.

Alec pulled on a shirt, glad the mark was low enough on his chest to be hidden by most of his shirts and now he just had to make sure he didn't take his shirt off during training sessions and no one should be the wiser to the fact he had gotten his soul mark.

Alec double-checked his weapons before leaving his room, heading toward the ops centre to make sure the on-going missions were proceeding smoothly.

"Status report!" Alec called out when he noticed the alarms blaring and he quickened his stride to a run. He skidded to a stop by Izzy and Jace who were staring at a video feed on the screens.

"A portal from Edom opened up in that warehouse you cleared of Circle members a few days ago… Nothing has come out yet, it's just sitting open like it's waiting for something." Jace said in confusion as Izzy checked some stats.

"It's stable and isn't flaring out with demonic energy that usually summons the lower levels to it. Wait, it's power levels are fluxing, I think something is coming through!" Izzy corrected herself and all their eyes were drawn back to the video feed and Alec felt his breath catch in his chest as his soul mark burned but it was a pleasant warmth.

His soul mate, the demonic merman's upper half was poking out of the portal. His golden cat eyes were looking around and an actual pout appeared on his lips when he didn't see what or who he was looking for. They watched as Alec's soulmate's head ducked back and the portal fizzled before fading from sight.

"Demonic levels are returning to normal levels," Izzy said quietly as the alarms were cut now that the threat was passed.

"That was weird right?" Jace questioned as his eyebrows furrowed together.

"Very, that must have been one of the higher classes of demons. It seemed to be looking for something and seemed sad when it didn't see what it was looking for." Izzy hummed as she picked up a tablet to go over a report.

"Call me if the portal reappears," Alec managed to get out before he was turning on his heels and heading back to his room. Alec closed the door to his room before leaning against it, his hand splayed across his soul mark as he inhaled deeply. Alec wanted to go back to that warehouse, to see if his soul mate would reappear. Alec wanted to know his soulmate's name, he wanted to know everything about the merman, he wanted so much but he knew he couldn't.

There was no way he could find his soulmate and vice versa, how would a Shadowhunter and high-class demonic merman ever be able to be together? Can soul bonds even be created for demons? Alec hung his head and stroked his soul mark over his shirt, sadness seeping into his very bones at the thoughts that spiralled inside of his head.

Alec gasped when he felt his soul mark burn pleasantly again and his head jerked up when paper began to blow in his room. Alec watched wide-eyed and leaned against the door of his room as a familiar portal began to spin into creation. Alec knew he should be triggering an alarm, reaching for a weapon; anything but instead he just watched and waited until his soul mate stuck his head out of the portal again.

This time a happy smile crossed his soul mate's lips and his golden cat eyes shone brightly.

"I found you pretty one, my pretty soul bond." The demon crooned happily as he held up his clawed right hand to show a matching gold print spanning the length of the limb. Something inside of Alec relaxed and he found himself taking a step forward, reaching out towards his soul mate.

"I will protect you pretty one, nothing will harm you while you are at my side." Alec's soul mate crooned, his voice washing over Alec in a wave of warmth and something clicked inside of Alec when their hands tangled together.

"Do you promise?" Alec found himself asking as the fires of Edom licked at his skin, but surprisingly leaving him un-burnt.

"I promise pretty one," The merman promised and Alec closed his eyes in contentment as he was pulled fully into the portal, which winked out of existence mere moments before the door was flung open and Jace and Izzy lunged into the room with their weapons at the ready but already too late.