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For Us

Summary:

Threatened with death at the hands of Solomon, you must defend yourself and Sebastian.
Major Spoilers for Sebastian Sallow's questline

Notes:

Someone asked for a fic where the reader casts the killing curse on Solomon instead of Sebastian, and what would happen after, so here we are.
Obviously, final warning, this contains Major Spoilers to Sebastian's quest, as well as violence and death, the reader literally has a panic attack. Technically Sebastian disassociates here.

Oh, and also, I have another request that's similar to this only instead the reader gets hit with a killing curse. I have been granted full authority to decide what happens; if the Ancient Magic saves you from the curse or not, so look forward to that, it'll be in here too, like a second chapter.

Chapter 1: For Us

Chapter Text

      You stood next to Sebastian as he shouted at his uncle, wands pointed at each other. You could hardly keep up with what they said as you felt your heart pound in your chest, unsure what would happen next as you looked at Sebastian. His eyes were glazed over as he continued to shout, you were sure there were tears threatening to spill. Solomon glared at the two of you, his jaw tight as he shouted his piece, wand pointed at Sebastian; ready to use at any second. Sebastian kept you close as Solomon began to yell more, keeping you slightly behind him just in case.

      “I will not stand for this, Sebastian! What you are doing is wrong, I have to turn you and your friend in!” Solomon shouted; his face held no remorse as he threatened you, no tears of regret or a sad glance sent over to you, just pure anger. Sebastian pushed you behind him as he shouted back. “I won’t have that! What we are doing is right, you won’t stand in our way!” You watched with wide eyes as they began throwing spells at each other, unable to move in fear of being hit. Sebastian kept himself in front of you to protect you; he didn’t want you to be part of the fight since it was a family matter, and if anything happened, he didn’t want you to be blamed. You were stuck, watching as red and blue and green shot back and forth, your head spinning as you watched Sebastian barely cast Protego in time as a red light whizzed toward him.  

      Once again you found yourself stuck in a stand-still, both men breathing heavily as they tried to catch their breath. “I won’t let you turn us in, I just won’t.” Sebastian breathed; wand still raised. Solomon shook his head, eyes burning with what you could only describe as rage. “Then stop this madness! You can’t run around with the Dark Arts! Just come with me, I’ll help you.” You inched closer to Sebastian, hand in your pocket as your fingers grasped your wand. Sebastian shook, his own eyes switching from sadness and betrayal to anger, his knuckles turning white as his grip on his wand grew tighter. “Do you really think I’d fall for that?” He spat, his gaze darkening. “You won’t let us walk out of here. You’ll turn us in no matter what! You’d rather see my humanity stripped away in a cell than help me save Anne; just like you always wanted!” Solomon shook his head as he sighed, glancing at you. “Do you really think she wants to be part of this?” He gestured to you, earning a glare from you. Sebastian scoffed, “Why would you care? She’s been with me every step of the way!”

      Solomon looked at you as you continued to glare at him. “You don’t have to do this, y/n.” You frowned as you watched him fake a concerned look, pulling your wand out. “You have no right to tell me what I can and can’t do. I chose this path with Sebastian to help his sister, something you couldn’t do.” You said, feeling your words drip with malice; Solomon giving you a final frown before reverting to his previous look, staring you down. “What you have chosen is darkness, I hope you know. There is no helping Anne, you have to know that.” He said, gesturing around him. “What you are doing here is futile! It’s pointless! You will be stopped.” Sebastian shook his head, his chest rising and falling at a quick pace as he felt his blood boil. “You know nothing! Nothing will stop us from finishing what we’ve already started!” Solomon sighed one last time, straightening his posture as he stared at Sebastian, the corner of his mouth twitching slightly. “Then I’ll have to deal with you myself, once and for all.”

 

      Your eyes widened as time seemed to slow; Solomon readying his wand as he began to shout. You gripped your wand as you felt yourself run forward, pushing Sebastian back as you pointed your wand at Solomon, eyes glazed as you shouted your own spell. “Avada Kedavra!” Solomon’s eyes widened as he watched you cast first, only able a split second to realize what you had done. You stared, anger replacing the shocked glaze in your eyes as the green light flew into his chest, a flash of regret filling his face as he dropped to the ground. You felt time speed up once again as you stood there, shaking as you released the breath you had been holding. You felt your eye twitch as you quickly tried to fill your lungs with air again, your brain catching up to where you now stood. Sebastian stood behind you, eyes wide as the shock hit him, unable to move as he tried to process everything.

 

      You shrieked as you looked at Solomon, unmoving as his glazed eyes looked over to you, your hands shaking as you dropped your wand. You looked at your hands in horror, the invisible blood that no doubt stained your shaking palms letting you know what you had done. You had killed someone, even if you feared he would have killed you and Sebastian, you still killed him. Your legs felt weak as you grew cold, dropping to the ground as tears slid down your cheeks, your whole body shaking. You glanced back at Solomon, growing colder as his dead eyes stared into your own, his lifeless body limp against the hard ground. You tried to breathe as you grabbed for your wand, muttering incoherently to yourself as you tried to rationalize what you had done. Sebastian’s ears rang as he felt himself return to the present, slowly looking around before his eyes landed on his uncle. He furrowed his brows, almost in confusion, as he looked between you and Solomon, his hands shaking for reasons he was unable to understand.

 

      You gasped for air as your chest tightened, desperately trying to stand as more tears ran down your face. You held your wand to your chest as you watched Sebastian, who could only look at you, watching as you backed away from Solomon, shuddering as you looked between them. Sebastian took a step toward you, his gaze softening as his brain registered your frightened face, causing you to back away from him as well, eyes wide like a doe caught by a predator. You continued to back away, looking around you for the exit; quickly turning to it and sprinting out. Sebastian watched you go, confused, as he slowly turned back to Solomon.

      Sebastian stood over him, his mind still processing what he was seeing. He remembered the conversation, if it was even that, between him and his uncle, but the rest of it was hazy. Everything had transpired in under a minute, leaving much for Sebastian to catch up on. He knelt and checked for Solomon’s pulse, eyes widening when he felt none. Hands shaking, he looked around, eyes somehow finding Solomon’s. “You…tried to kill me?” He whispered, recalling how Solomon had begun to shout; he could have sworn he heard the beginnings of the killing curse before you shouted it yourself. Tears pricked at his eyes as the realization hit him in full force, quickly crawling away from Solomon’s body as the breath was stolen from his chest. You had killed Solomon, before he could kill the two of you. Sebastian’s eyes widened as he quickly stood up, looking around frantically for where you might have run off to.

 

      “Y/n!” Sebastian shouted as he ran out of the ruins, looking around. He found you farther away, your sobs leading him to you. You had fallen to your knees again, wand tossed away where you couldn’t reach it. Sebastian ran to you, dropping down to take a look at your face. You gripped the clothes at your chest, eyes wide as you struggled to breathe, muttering to yourself once again. “Y/n.” He said softy, his gaze softening as he watched as tears stained your cheeks and soaked your shirt. Slowly, he moved closer, shakily wrapping his arms around you as he brought your face into his chest, rubbing your back as you sobbed harder. He held you tighter as he softly rocked with you, feeling his own tears fall from his eyes. “It’s okay, you’re okay. I promise.” He said softly; unsure if he was trying to reassure you or himself that everything was fine, He wasn’t the one that cast the spell, but the guilt of the matter squeezed his heart as you shuddered, slightly whining as you tried to talk.

      “I…Killed him.” You muttered between sobs; your whole body shook as you continued to fill your lungs with air. Sebastian hushed you, running a hand through your hair as he peppered small kisses to the top of your head. “Don’t think about that, just focus. You’ll faint if you don’t fix your breathing.” He said quietly, feeling you nod softly into his chest as. He tried to guide you into a normal breathing pattern, taking deep breaths and slowly exhaling as you followed suit. “I heard him. He was going to kill you.” You gasped, feeling your heart speed up again as you thought back to what had happened. Sebastian shook his head as he held on to you, nuzzling into your hair as he tried to distract you, focusing on your breathing once again. “You had to, it’s okay. I promise, you’re okay.” The two of you sat there for a few moments, Sebastian continuing to guide you out of your panicked state.

      You sniffled as you pulled your face away from Sebastian, eyes red as you looked up at his face. Sebastian felt his heart break as he took in your teary face, slowly bringing his still shaking hands up to your cheeks as he rested his forehead against your own. “You’re okay. We’re okay. You did what you had to do.” He whispered, feeling you nod slightly as you shook. “I still can’t believe it…It shouldn’t have happened this way.” You breathed; your voice still shaky as you tried to dry your tears. Sebastian took your hands in his own as he placed a kiss to your forehead. He helped you dry your tears as you sniffled once again. “You did what you had to. You did it for us, you had to.” He said softly, kissing your hands. You began to breathe normally again, closing your eyes as you repeated his words in your head. Sebastian placed a soft kiss to your lips, resting his head against yours once again, whispering. “I’m here with you. You have me by your side. I won’t let anything like this happen again.”

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