Chapter Text
It had been the perfect day. Levi had woken to a wonderful breakfast prepared by the family butler, before his parents had taken him out to shop for a birthday gift. The evening had been filled with laughter and even in such a world as the one they called home, as Levi drifted off to sleep, he knew he was lucky.
The flames raged around Levi as he was dragged from his room. The stairs left bruises as he was hauled down them and no matter how much he kicked or screamed the rough hands wouldn't let him go. He stopped struggling when he saw his parents bodies. What hope was there for him when someone as strong as his father could be mutilated like that?
What followed next was a level of pain that Levi knew he would never forget and as he cried out for God- for anyone who could make it stop -they had only laughed at him before they shoved him into a cramped cage.
A deeper laughter began to echo around them and as the shadows crept in from the corners of the room he'd been trapped in, Levi prayed that he was finally dying.
"Levi Ackerman." A smooth voice said as a tall, blond man stepped from the shadows. "You have made a substantial sacrifice, it is now for you to decide whether or not you will accept this contact and be granted that which you desire. But be warned, you will be abandoning the light for the path of Hell."
"What are you talking about?" One of his captors asked horrified. " We summoned you, to grant us power and wealth! The boy is the sacrifice!"
The man was silenced with a withering glare, hands clawing at his throat as if he could no longer breath as he silently gasped. Levi's eyes widened as he watched the man fall to his knees and his other assailants began to scramble over each other in their rush for the exit.
"I'll do it! I'll make a contract with you!" Levi yelled, gripping the bars as he stared up at his unlikely saviour. "Give me the power to take down the men who destroyed my family! Make me stronger than any enemy I face!"
It didn't matter what the price was, there would never again come a time when Levi knew such powerlessness or pain. Even if he had to give up his very soul to make sure of it.
"Good." The demon replied, kneeling to meet Levi's eyes with his own blazing gaze. "I will have to mark you. The seal with serve to bind us until the contract is complete. I will always be able to find you, and you will never be able to escape."
"Do it." Levi replied through gritted teeth, a scream tearing through him as the demons hand rested over his heart and it felt like he was being burned from the inside out.
"Now." The demon asked, smooth voice cutting through the pain that had consumed him. "What do you command of me?"
"Kill them." Levi spat, and as the shadows grew around his cage, blocking out his view of the room. "As you wish." Came the demons reply, before the air was filled with the sound of his captors screams.
Screaming soon faded into silence and as the shadows withdrew, the blond stepped forward to tear the lock from the cage before drawing Levi into strong arms.
"State the terms of our contract and be specific, I will allow you up to three conditions." The demon informed him as he carried Levi into the fresh night air.
"You will never lie to me." Levi replied, fixing the demon with a steely gaze after he had been set back on his feet. "You will always protect me and never betray me. And most importantly, until I have my revenge, you will obey my orders unconditionally."
"Your wish is my command." The demon replied, smiling down at Levi in a way that made his skin prickle. "Until the day that you have claimed your revenge, and then your soul is mine."
"If that's the price, then I'll gladly pay." He replied flatly, turning his eyes to the wall that loomed over them in the distance. He didn't know where they were- where he'd been taken -but if they could get to the top of the wall it would be easy enough to figure it out.
"Do you have a name?" He asked his companion as they walked past the stone buildings towards the wall.
"My name is whatever my Master wishes." The demon replied and Levi paused as he looked up at him, considering the blond for a moment.
"Then your name will be Erwin." He decided, before he continued walking, trusting the other would follow him.
"Erwin." The demon repeated with a nod as he followed after the human. "A good name. Did it belong to someone important to you?" He asked curiously.
"It was the name of my dog." Levi informed him, not looking up at the demon who let out an unsatisfied hum.
Once they had made it to the base of the wall, it was only a matter of seconds before Levi was sped to the top in the demons arms and as the sun rose he found himself standing on the top of wall Sina, staring down at Mitras
"Are you surprised to learn that your enemies may come from the heart of your world?" Erwin asked and Levi let out a huff as he glared out at the city below him.
"No. I expected as much." He replied darkly "And It doesn't matter. I don't care if I have to burn everything inside the walls to stop them I will."
He didn't expect the promise to be met with the sound of laughter and he tore his eyes away from the city to glare up at the blond. "What's so funny?" He asked.
"Oh nothing's funny. I can just appreciate the irony of being ordered to be honest with you, when you yourself seem like a liar." Erwin replied simply as he met Levi's glare with an unflinching violet gaze.
"Do something about your eyes, I want you to at least try to blend in." He commented coolly, rather than rise to the accusation. As long as the demon was loyal, Levi didn't care what he thought of him.
"Does this satisfy you?" Erwin asked, closing his eyes for a moment before he opened them again and Levi was met with a startling blue gaze.
"It's fine." Levi replied, looking back out over Mitras one last time before turning his back on the heart of his world. "We shouldn't waste any more time, there's work to be done."
"As you wish, Master." The demon replied, lips quirking in a cold smile as he followed the human along the wall.
Whatever he'd expected when he'd been summoned, it hadn't been this. But far from being disappointed, Erwin was intrigued to see what his new master would do with the power he had so dearly paid for.
And if nothing else, the opportunity to kill humans until he finally was able to claim the meal that waited for him would keep things interesting for the time being.