Then a bright light appears, practically blinding them but only Mammon who is partially out the door can see it clearly before he slams it shut. Now the brothers are curious, hurling questions and Satan being the first one to reach for the door handle. Mammon transforms into his demon form and growls, something animalistic and feral.. Satan is even too shocked to be angry, the second oldest would never threaten any of them, especially in his form. "What's going on? Why is Mammon acting like this?" While they whisper out loud, Levi is the first one to see Mammon's shaking hands and his panicked breathing as his eyes shifted over each brother one by one as if mentally counting them. As if he could blink and one of them would disappear.. Levi is the first to approach Mammon and stops that the batted growl in his throat. "Mammon what's wrong?" He speaks, but not in the language that the others can understand, but from their time in the Celestial Realm so long ago when they only had each other. He tries not to pay attention to the confusion on their faces, seeing that Mammon was searching for a way to reply and he found himself a fool for thinking that Mammon remembered until-

"Angels. Angels are attacking the Devildom."

And Levi doesn't want to believe it, his heart races and he begins to shake too, not even realizing that he had transformed into his demon form as well. The younger brothers are now even more worried, but all they can do is look at each other as the oldest in the room talking amongst themselves. "Leviathan, you know I'm not lying to you-" "Of course I know that! Mammon what do we do...how do we tell them? Oh...Lucifer." His hands cover his mouth, blinking back tears of relief as Mammon shakes his head, "He ain't...he's strong. I still feel em'..the pact ain't acting up." The second-born pressing his back even closer to the door, growing explosions and now screams being heard from the outside. Satan has had enough, now seething with anger as he launches at Mammon only to be held back by Beel. "What the fuck are you hiding? What aren't you tell us, Mammon?!" The burning in his gut was only fueled by the look he had gotten, just oozing with pity. From what? What the hell was happening out there?

The sudden slams at the door made them perk up, both eldest was muttering curses as Mammon held the door up and Levi began leading them away from the living room. "Get them out of here!" He growled, the heavenly aura too prominent to ignore. All of them are now in their demon forms ready to fight but being pushed away easily by Levi's tail. "Where are we going? We need to help Mammon!" Asmo cried out, though gasping at the opening door by the bookcase in Lucifer's room. "This will take you straight by Lord Diavalo's castle. You should be able to get there safely.." It was odd to see such confidence and reassurance from their most withdrawn older brother, Levi offering them his most characteristic nervous smile. Satan was still thrashing in Beel's hold, "Mammon can't take all those angels by himself! You know that!" Leviathan smiled, nodding in agreement before shutting the door behind Belphie. Satan letting out an ear-piercing scream as the eldest brothers now locked away to fight on their own.

And how he can lose them to the Celestial Realm.

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Levi's hand stayed pressed against the metal door, if he leaned in enough he can hear the footsteps of his younger brothers running to what he hoped was assured safety. His legs felt like jello and that he could barely hold himself up, anxiety pumping through his veins as he rushed downstairs. There was no courageous bone in his body, he was just a shitty pathetic otaku and all too eager to hide away in his room and wait for an attack to be over, for this fucking nightmare to be over. He watches Mammon continuing to fed of the doorway, trading punches and blasts to those who tried to come in. God, he was all too aware of his tail and horns, the clothes of his demon form feeling all too tight. "Levi! A little help here?!"

Mammon's shout brings him back to the despair of reality, getting a running start as he pulled the angel off of him and began to tug at its wings before completely ripping it off with his tail. The angel cries fall silent and the two brothers meet each other's eyes as the blood begins to reach their feet. "..They're just newborns, why the hell would the Celestial Realm send newborns to try and attack us?" Mammon spoke, effortlessly gutting one that attempt to fly overhead and turning away quickly, his own claws digging into the palm of his hand and it's hard to tell which of the dripping blood is his own or an angel. Levi doesn't want to think about it, it's clear when he closes his eyes and ripping apart wings like paper. He can't bear to imagine each one that he kills being around Luke's age...he just can't. "This is just for a distraction, we gotta give them time to get to Dia's castle," Mammon speaks in plan in their shared language while twisting the angel's wrist, and Levi is unable to hide his grimace from the loud crack that followed.

He keeps sinking, deeper into his own thoughts and trying to ignore the way his heart clenches at the painfilled screams and his eyes constantly shifting so he can kill on sight. There was a brief pause but sadly no relief from the attacks as he screamed, "Mammon look out!" The window of the living room shatters as an angel now armed with a sword tackles the eldest brother, Levi turns to help but finds himself surrounded with similar swords that he knows he can't let them touch him. He breathes in deeply, despite his own self-doubt, he knows that there is a reason why he is part of the most powerful in Devildom though he is at a territorial disadvantage. He snarls baring his teeth now soaked with blood and fire pooling into his gut as some of them back off in fear.

His tail acts first, grabbing an angel behind him by the throat and viciously digging his claws into their eye sockets and watching in crazed delight as the blood oozed out. He looked at their fortified expressions and found himself completely void of pity, where was that hesitation when they so eagerly attacked? Where was that fear that could have driven them away from this house? Their home...his brothers..all split apart because of this attack made anger bubble in his throat. It was feral and ugly, Levi leaving gaping holes in the bodies of already dead angels and the growing thirst for more carnage-

"Are ya done yet? Talk about overkill, Levi."

He blinked as if awakened from a long nap, removing his knee from the angel's back as he stood. They were both panting and clearly becoming exhausted, but he couldn't look away from Mammon's cocky grin and wiping off the remaining feathers. Too many questions flooded into his head, how long will they be able to defend their home? What more they could handle before eventually passing out? Were the younger brothers safe and sound? And why did Mammon look so cool at this very moment? He had watched Mammon so effortlessly fight angels that even he was struggling with, looking so strong and willing to defend their home while Levi's first thought was to run away. He wasn't brave like Mammon, he wasn't strong, even weaker angels put up a fight. He was so weak it was disgusting, he was disgusting and stupid to think that he would be worth anything in comparison to fighting with Mammon.

Bitter admiration and malicious jealousy dances in his chest, he pants and stumbles into the wall as his vision blurs. Now only showing the pure white of his eyes and the last thing he hears is Mammon distantly calling out his name...and Envy taking over. There is an orange glow emanating and pulsing as Levi's form shifts and changes, he grows larger as the scales covering his entire body are now sharp like razors. He's more snake-like, hissing and gurgling deep within his throat, and makes his way to the streets of Devildom, quick to attack any demon or angel that gets in his way.

Mammon curses as he runs after his brother and racking his brain for any way to bring him back but the sight in front of him made him stop. Watching a multitude of angels continue to stab their blades into Levi's tail and this untamable rage begins to take hold of Mammon. The mocking laughter of those surrounding him, filling his ears and drowning out any conscious thought out the window. "We'll kill you and all your brothers too! Devildom is ours for the taking." This sort of desire to make them shut the fuck up leaves a bitter taste in his mouth, black feathers completely decorating his arms as he stumbles back, trying his best to calm down. To think clearly, Lucifer would want him to keep his head on his shoulders, he would be so disappointed if Mammon couldn't keep it together from some small taunts. But such needs...were growing to be too much, the desire to protect the ones he loved became something he could no longer suppress as he let himself transform and sink deeper into this kind of greed.

The greed that the only annihilation can fulfill.

Violence.

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Ahhhhh I am so happy that so many people fell in love with this au! Thank you for all the likes and excitement, it really means alot ❤ and once again a thank you to the fabulous @asterronomical for not only helping me review ideas for this part two but also giving visuals into the brothers (Levi and Mammon) current forms!

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Levi can count on one hand how many times he's seen Lucifer coming home injured. The Avatar of Pride could easily crush irrelevant demons with his glare and he proved worthy of Diavalo's right-hand man for a reason... But the first time that Levi remembers was on a travel mission with Lord Diavalo within a year after their fall from grace. It was a distant memory, seeing Lucifer stumble up the stairs blooded up and adamantly refusing care from any of them, even Mammon who was following behind his every footstep. He had gotten used to such behavior and just settled for turning up his headphones on his way to the safe haven that was his room, stopping when he noticed the eldest's door cracked open. He watched Mammon gingerly wrap the bandage around his shoulder, blinking back tears in his eyes and shaking his head vehemently as Lucifer spoke. The music was loud and distracting he just settled for reading their lips-

"Mammon I need you to do this for me.."

"I won't! There's no need, ya just paranoid-!"

Watching the tears well up made Levi shift, uncomfortable and jealous, wondering what bond allowed them to be so vulnerable so open. Hadn't they all fought their father together? Rallied behind him so readily behind Lucifer, their Morningstar that only shined a light that only Mammon was allowed to see. He lingered before continuing to walk down the hall, to dwell in his own sunken loneliness but hearing Mammon speak one more time before the door had shut.

"..I'll do it, alright? Just stop ya crying, Luci.."

He had felt the deja vu of that very moment playing out in front of him, though this time he was hiding from Mammon in his secret spot in the living room. They had planned to go to the movies in an hour and Levi knew that Mammon would try to find him to convince him to pay for the tickets yet again so he decided to wait out the time so that scumbag would have to bring his wallet. It was a surprise to see the door open, everyone else is out and Lucifer's return to be scheduled for a few more days, but instead, the eldest had come early with visible wounds and beatings. Levi felt frozen, debating on whether he should slip out to help or stay putt but once again Mammon comes down the stairs like it's his calling. "Lucifer? Let me help you!" Denial was the first given reaction, the eldest's heart too hard and stubborn to ask for help before collapsing into Mammon's arms.

Levi followed with anxiety brewing in his chest, now wanting to just hide away in his room since plans were clearly on hold and he could do nothing to help the pair. Not like they would want his help, a shitty pathetic otaku wasn't much good at bandaging wounds, not like he was able to get much practice like Mammon did. Jealousy seethed, it made his heart race as he hid to the side of the door at the mention of his name.

"We have to tell him, Mams."

"We don't have to tell him shit! It's fine like this...Levi doesn't have to be involved."

It was confusing to be thrown out of the loop, but it hurt to hear Mammon so effortlessly fight to not include him. Maybe the second-born felt that Levi wasn't worth it? Too weak and unable to do..whatever it is they are arguing about, even so, it was odd-looking into Lucifer's room. Mammon unafraid of the eldest's temper and even being so bold as to glare at him while cleaning his cuts, Lucifer had an expression of utter fondness that was intertwined with an unlabeled fear, one that only he seemed to see.

"Mammon, you know it takes a lot out of me to..admit this. I'm almost jealous that you're able to view me so..."

Shit shit shit, he had been so entrapped in their conversation and his own envy he hadn't realized that it was emitting throughout the hall. He stiffens when Lucifer calls his name, slipping out from where he was hiding and now embarrassed. "Levi..come here please." He notes that Mammon refuses to look at him, biting his bottom lip hard as he sits next to his brother, so not used to this soft tone from him. He really must have stepped into a completely different world, one where Lucifer is willing to fight tooth and nail with his own pride in order to tell them the truth. And what a horrid truth it must be.

"Lucifer what's going on? Why is Mammon..." He trails off, feeling Lucifer's hand skim through his hair, and despite his own embarrassment leaned into the comforting touch and suddenly the bottle of Demonus was looking very tempting. "Levi...I would like to involve you in something very important, in order to protect the others." Lucifer's words were slow, each one taking some kind of will to overcome his pride, his wings twitching in what Levi could easily place as anxiety and one he knew way too well. "I'm not allowed to say anything about the threat outside of the Devildom but it puts us at risk and I...There may be a chance I won't come back."

His stomach drops, he doesn't realize that he's shaking until he feels Mammon's arms wrapping around his shoulder, shaking his head in pure denial. Not Lucifer, the most powerful one of them all, their eldest brother not coming back. Such thoughts were unfathomable to even believe, much less considered as a probability to the point that they had to talk about it. Acknowledge it and take action, Lucifer keeps talking and Mammon presses Levi closer to his chest, "I talked this with Mammon since the beginning but now we believe it's time to tell you in case something were ever to happen to the both of us and you would decide when to tell Satan..."

The prospect of such responsibility makes Levi feel like a fish out of water as he gulps for air yet in that same breath go on a rampage of self-deprecation and drowning doubt. How he's not ready, he's a good-for-nothing shitty pathetic otaku, he can't protect his brothers, he's weak, he's nothing, if Lucifer and Mammon are gone then there would be no fucking hope for them. The two oldest look at each other, small bits of regret building up from the pressure and burden they had put on him, Mammon gently rubbing his back and Lucifer cupping his face. "Leviathan please breathe."

His body does it automatically before he can think about it, the air in his lungs felt like boiling water as the panic slowly dissipates in his chest. All that was left was his own soft mutterings, so sure that Lucifer was probably disappointed that he has to trust in Levi of all people to protect them, he leans against Mammon who nudges him affectionately before resting his head on his shoulder. "I...I haven't really done anything good since...I was General...how can you be so sure in me?" He asks but squirms unready for whatever the answer might be, though he's unable to mistake Lucifer's radiating pride that he feels.

"Who's the one who came up with the plan on where to steal the weapons in the Celestial Realm?"

"M-Me but I-"

"And who helped convince the others to lay low while we defended the base?"

"I did but Luci-"

"Who's the one who took an arrow for Mammon while he was trying to protect me?"

"Lucifer-!"

He gets cut off with a flick on his forehead, his lips set in a pout but meeting the Morningstar's expression that made butterflies bloom in his stomach from overwhelming pride had him turn away and looking down at the floor. "Levi, get out of your head for one second and look at how smart and tactical you are. When it matters...when there is no time to panic. You're the third strongest family for a fucking reason, you should start believing it." The unusual confidence makes him flush but it's really Lucifer's words that bring the tears, no longer from fear but slowly coming to the realization that Lucifer and Mammon too had faith in him...they always did.

"Do ya still wanna join the pact? If ya wanna think about it, ya still can Levi." He blinks at the fact that Mammon had really been silent this whole time and just hugging him, the second born now getting up to tighten the remaining bandages. "Did you think about it, Mammon?" Levi knew the answer in his gut, only the blind would question the unwavering devotion that Mammon and Lucifer had for each other, only further cemented as the Avatar of greed simply shakes his head. He feels a small smile form on his face, "Then I don't need to think about it...I want to do this."

By the next few hours, any of the remaining tension and somber feelings had slipped away, replaced by a calm atmosphere that usually would not last long in the House of Lamentation. The melody of the cursed record floated and hung in the air as Levi rested on the floor in his demon form, the pact officially made and learning about the secret doorway by Lucifer's bookcase, definitely locking that information into memory. He sees Mammon grinning above him, curiosity embedded in his features, "So where'd ya decide to put the pact mark?" Levi lifts his sweater, the symbol of the three still glow fresh on the side by his ribs, and Mammon hissing with empathy.

He wanted it to hurt weirdly enough, to serve as a forever reminder that this pain was temporary but the pain of losing his brothers would surely last till the end of time. Mammon shows the mark on his hand, Lucifer clicks his tongue in disapproval as someone might ask about the pact but the second brother waves his concern away. He enjoys looking at the pact, the constant reassurance that they would be okay when the word goes to absolute shit, and Lucifer couldn't find any argument against that. They both look at the eldest who crosses his arms with a sharp, "No-" before puppy eyes come into play and Lucifer's pride can not save him from that.

What they both don't expect is for Lucifer to turn around and spread his wings out as if to show off, but then they see it. The markings trailing up his spine and next to the scars of where his two wings used to be, Levi is the first to reach up and touch it, internally blaming the remnants of Lucifer's pride that is making him so bold. He sees his hand tremble but luckily he is able to hold his voice steady, "Just because we made this pact..doesn't mean you both get to just fuck up. Y-You both should always come home." Lucifer nods, Mammon kisses his cheek and Levi struggles to hide his tears.

When Levithan leaves the room while closing the door behind him, reality, as he knew it just a few hours ago, wasn't all that different and he can hear Asmo drunkenly cheering as Satan carries him through the door. "Hey, Levi! Don't hide in your room- you better come join us." He doesn't give his thoughts a chance, heading down the stairs with a small smile. The world hadn't changed, but Levi would be forever.

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AHHH THIS HAS BEEN SITTING THE DRAFTS FOREVER I'M SO GLAD I FINISHED IT. Please please let me know if I should make an explanation post of how the pacts would work (it will most likely be headcanons cause I don't know how they work in canon 😪😪)