The cellar beneath the tailor's shop hadn't been used for anything but storing bolts of unsold fabric in years, which made it perfect. Aurelian had paid the landlord an extra two silver a month for access to it, claiming he needed a quiet place to study. The man hadn't asked further questions. Quiet places to study were apparently common enough requests in this part of the city that nobody thought twice about a tenant who wanted privacy and a door that locked.
He stood in the middle of the cramped space, surrounded by dust and the smell of old dye, and rolled his shoulders experimentally.
The body felt different from the one he'd worn as Julius Vaelorian. Heavier in a way that had nothing to do with mass, denser in a way that suggested the flesh itself had been built from something other than ordinary biology. He had noticed it in small ways since waking on the shrine floor, the ease with which he moved, the strength in a grip that should have belonged to a much larger man. He had been too occupied with survival to actually measure it.
Now he had time, a locked door, and nothing left to lose by finding out exactly what he'd become.
He found an old iron anvil shoved into the corner of the cellar, abandoned by whatever tenant had occupied the space before the tailor moved in. It looked like it weighed somewhere close to two hundred pounds, the kind of dead, stubborn weight that didn't care how strong you thought you were. Julius Vaelorian, even at his most trained, even with Joseph's brutal lessons hammered into his muscles, would have needed both arms and a running start to budge it an inch.
Aurelian crouched, gripped the edges with both hands, and lifted.
The anvil came up off the floor like it was made of wicker.
He stood there for a moment, holding it at chest height, waiting for his body to register some kind of strain, some signal that this was a feat worth feeling proud of. Nothing came. No burning in his shoulders, no tremor in his forearms, no acknowledgment from his own muscles that they had done anything at all. He set it down gently, more out of habit than necessity, and stared at his own hands.
This wasn't Aura-enhanced strength. There was no mana being channeled, no Hellfire crackling around his knuckles. This was just what his body did now, baseline, without effort, the way an ordinary man's body simply stood upright without thinking about it.
Ten thousand years of accumulated demonic essence had to occupy space somehow. He had built this body from memory and mana, and the memory his unconscious mind had reached for, in the absence of any other template, was the body of a demon lord who had once been strong enough to carve his name into the world's mythology as one of the Seven Deadly Sins. Of course the strength had come with the shape.
He spent the better part of an hour testing the boundaries of it. He bent an iron rod from an old loom frame into a circle with his bare hands, the metal groaning and folding like soft clay. He punched the cellar's stone wall, carefully, almost apologetically, and watched a fist sized crater bloom in the surface, dust raining down from the ceiling above. He didn't dare test it on anything load bearing. He had no intention of bringing the tailor's shop down on top of him on his first week in a new identity.
The strength was not the part that frightened him, though. The strength, at least, made a kind of sense. The part that made his pulse skip, when he finally tested it, was something else entirely.
He had cut himself before, in the months as Julius, training scars and battle wounds that had healed at a normal, frustratingly human pace. He hadn't paid much attention to his healing since waking up in this new body. There hadn't been an obvious need to. But sitting in the cellar with nothing but a borrowed kitchen knife and a great deal of curiosity, he decided it was time to find out exactly what kind of body Beelzebub's inheritance had given him.
He drew the blade across his palm, a shallow cut, the kind that would have bled for a few minutes and scabbed over within a day in his old life.
The wound closed before the blood had finished welling up. Not slowly, the way a healing potion might accelerate the process. Instantly. The skin simply knit itself shut, the blood that had escaped drying and flaking away as though it had never been fresh, leaving behind unmarked flesh and a faint lingering warmth that faded within seconds.
He stared at his palm for a long moment.
He tried it again, deeper this time, drawing the blade across the same spot with more pressure, deep enough to see the pale gleam of something beneath the skin before the wound sealed itself shut again, faster than his eyes could properly track the process. There was no pain to speak of either, or rather there was pain, sharp and immediate, but it vanished as quickly as the wound did, as though his nervous system had decided suffering was simply too inefficient a use of resources for an injury that would not last.
He needed a bigger test. He needed to know the actual limit of this, not the polite, reassuring version of it.
He picked up the knife again, found the joint of his smallest finger, and without giving himself time to talk himself out of it, sliced through.
The finger dropped to the cellar floor with a small, unceremonious sound.
Aurelian held his hand up to the dim lantern light and watched the stump where his finger had been. For one full second, nothing happened, just raw flesh and the dark welling of something that wasn't quite blood, thicker, with a faint oily sheen to it that caught the light wrong.
Then black tendrils erupted from the wound.
They moved like smoke given just enough substance to hold a shape, threading outward from the stump in fine, searching filaments, weaving over and around each other with the deliberate, organic logic of something growing rather than simply forming. The tendrils darkened, thickened, began compressing inward, knitting themselves into the rough silhouette of bone, then muscle, then skin, the entire structure assembling itself from the outside in like a sculpture being poured in reverse. It took perhaps four seconds, start to finish.
When it was done, a finger sat where the old one had been. Identical in every visible way. He flexed it. It obeyed perfectly, no stiffness, no tenderness, nothing to indicate it hadn't been there his entire life.
He looked down at the severed finger still lying on the cellar floor. It hadn't moved, hadn't twitched, had simply gone gray and lifeless the moment it separated from him, already beginning to look less like a piece of a person and more like something carved from old wax.
Aurelian sat with that information for a long moment, turning the implications over with the same cold, methodical care he used to apply to plotting out a chapter back when chapters were the only thing he had any control over.
A finger was a small test. He needed to know what this body would do with something it couldn't simply patch over with a clever trick of regrowing skin.
He picked up the knife, walked to the cellar's lone wooden support beam, and rested his right forearm against the rough wood. He took a slow breath, the kind of breath a man takes before doing something his own instincts are screaming against, and brought the blade down in one clean, committed motion.
It did not go cleanly. The arm was not meant to be severed by a kitchen knife in a single stroke, and it took three brutal strokes and a final wrenching pull before the limb separated entirely, falling away in a mess of blood and tissue that pooled dark and slow against the dusty floorboards.
The pain was extraordinary, a white howling thing that filled his skull entirely, and for a moment Aurelian understood, with perfect clarity, that he had perhaps made an error in judgment regarding how casually to test the boundaries of his own body.
Then the stump began to change.
It did not heal the way the finger had healed. It was slower, hungrier, and far less polite about announcing itself. Black smoke billowed from the wound, thick and acrid, smelling of sulfur and scorched iron, and beneath the smoke something writhed. Threads of dark, glistening tissue erupted from the stump like roots breaking through soil, twisting and lashing in the air before curling back inward, weaving themselves into a rough lattice that pulsed with a deep crimson light from somewhere inside its own structure. The lattice thickened, darkened, began to take on the crude shape of bone, joints clicking audibly into place one after another as though something unseen were assembling a skeleton from spare parts.
It looked nothing like ordinary regeneration. It looked like the limb was being built by something ancient and patient and entirely without sentiment for what a human body was supposed to look like while it grew. Muscle fiber spooled outward from the bone in dark ropes, wrapping and layering with a wet, organic sound that turned Aurelian's stomach even as he watched, fascinated despite himself. Veins of molten red threaded through the muscle like cracks in obsidian, glowing faintly before fading as skin finally sealed over the whole grotesque process, smoothing out into something that looked, for all the world, like an ordinary human arm.
The entire sequence had taken perhaps twenty seconds.
He flexed his new fingers. He rotated the wrist. He lifted the arm and inspected it under the lantern light, searching for any seam, any discoloration, any evidence at all that this limb hadn't been attached to him since birth.
There was nothing. It was perfect. It was also, he had to admit, one of the more horrifying things he had ever watched happen to his own body, and he had personally summoned a black hole inside an academy training chamber not even four years prior.
He sat down heavily on an overturned crate, breathing hard, and allowed himself a long moment of simply existing inside the wrongness of what he had just become.
This was not a healing factor. This was not even particularly close to the kind of regeneration he had read about in other novels he'd consumed back in his old life, the tidy, sanitized version where a wound simply closes and the character continues fighting without missing a beat. This was something closer to what he imagined a primordial entity's body might do, something that treated its own physical form as raw material to be discarded and rebuilt on demand, indifferent to the horror of the process because the process itself had no observer who needed to be spared the sight of it.
He thought of the severed finger, gray and dead on the floor, already beginning to smell faintly of decay. The body did not preserve what it lost. It simply made more.
He filed the information away with the rest. Whatever he had become, it was not human, regardless of how human the face in the mirror looked.
The strength and the regeneration, he came to understand over the following days, were only the most obvious parts of the inheritance. The deeper layer, the part that took real effort to access, lived in the quiet space behind his own thoughts where Beelzebub's folded essence now resided.
It wasn't a voice anymore. He had confirmed that much already. But it was a presence, in the way a long unused muscle is a presence, something he could reach for and feel respond, even without conscious instruction. When he closed his eyes and reached toward that presence the way he used to reach for the Daimao System's familiar interface, what answered back wasn't a notification window.
It was knowledge. Raw, unstructured, ten thousand years deep, arriving not as words but as a kind of instinctive understanding, the way a person simply knows how to walk without consciously studying the mechanics of it.
He started with fire, because fire was the thing he already understood best. Hellfire had been a gift handed to him by the Daimao System's first quest reward, a power he'd wielded without ever fully grasping its underlying architecture. Now, without a system to hand it to him prepackaged, he had to build it from the components Beelzebub's memory provided. He spent an entire afternoon in the cellar simply sitting cross legged on the dusty floor, eyes closed, reaching into that ancient well of instinct and pulling threads of understanding loose one at a time.
Hellfire was not fire in any conventional sense. It was a kind of directed hunger given the shape of flame, mana converted into something that did not merely burn but actively consumed, breaking down the essence of whatever it touched rather than simply applying heat to it. He had used it before without understanding any of that. Now, rebuilding it from first principles, he found he could shape it with far more precision than the system had ever allowed. A small flame, contained entirely within his palm, no larger than a candle's, burned without consuming the air around it or scorching his own skin. He extinguished it and tried again, larger this time, until a controlled column of black and crimson fire rose from his open hand and hovered there, patient, waiting for direction.
Infernal Lightning came next, and it came harder. Beelzebub's memory offered him the concept readily enough, a weaponized expression of demonic energy translated into raw electrical force, but his body had no natural affinity for it the way it apparently did for fire. His first attempt produced a faint crackle of static along his fingertips and nothing more. His second attempt singed the sleeve of his only good shirt. By the fifth attempt, a thin, jagged thread of black lightning arced from his fingers and struck the old anvil with a crack loud enough that he winced, half expecting the tailor upstairs to come investigating. The anvil bore a small scorch mark afterward, dark and faintly smoking, a modest result for an enormous amount of concentration, but a result all the same.
Demonic Aura Reinforcement was, by comparison, almost embarrassingly easy. It was simply an extension of the same principle that had let him casually lift an anvil without effort, except now he could direct that latent strength outward in a controlled shell around his body, hardening his skin against impact, sharpening his reflexes, lending speed to movements that were already unnaturally fast to begin with. He tested it by punching the cellar wall again, this time with the aura active, and the crater it left was easily three times the size of his earlier, unenhanced attempt.
The spatial magic was the one that truly excited him, and the one that frustrated him the most.
Subspace had been simple, granted whole by the system, an infinite storage space he had never needed to understand the mechanics of. Beelzebub's memory offered him something rawer and far less polished, an ancient form of spatial folding that predated anything resembling a convenient inventory function. It took him three full days of failed attempts, of straining against a concept his mind kept slipping off of like wet stone, before he managed his first success.
A tear opened in the air in front of him, no larger than a dinner plate, its edges rippling with faint violet distortion. He could see through it, a few feet of identical cellar air on the other side, displaced from where he stood by roughly the length of the room. He reached his hand through, felt the strange, pressure-shifted resistance of crossing folded space, and watched his own fingers emerge from the second opening several feet away.
It was crude. It was small, unstable, and limited to distances he could have crossed by simply walking. It bore almost no resemblance to the effortless, world spanning convenience of Subspace. But it was his, built from nothing but inherited instinct and stubborn repetition, and that made it worth more to him than the system's gift ever had.
He sat afterward in the cellar's gathering darkness, the lantern burned low, his new arm resting easily against his knee as though it had never been anything but his own. Three years of bodiless patience had built him a vessel. A handful of days of deliberate, focused effort had already begun rebuilding the powers that vessel was capable of holding.
The Daimao System was gone. He had mourned that loss, briefly, in the quiet hours after waking in Rurnatia, the absence of its familiar red windows feeling like a phantom limb of its own. But sitting here now, having just spent an afternoon discovering that his body could rebuild a severed arm from black smoke and infernal light, having watched a crude tear in space open and close at his own command, he understood something he hadn't let himself fully consider until this moment.
The system had been a leash as much as a gift. It had handed him power in neat, pre-measured packages, quests with defined rewards, skills that activated and deactivated with the press of a mental button. It had been efficient, certainly. It had also been limited, bound by whatever rules its own creation had imposed, capped by a structure he had never chosen and had no power to expand beyond.
What he had now had no ceiling at all.
Ten thousand years of accumulated demonic knowledge did not arrive all at once, and he suspected it would take him years, perhaps decades, to fully excavate everything folded into the quiet space behind his own thoughts. But every piece he managed to dig out belonged to him completely, unconstrained by any system's notion of what a skill should look like or how powerful it was permitted to become. The Hellfire he'd rebuilt by hand already responded to him with more nuance than the version the system had handed him on a platter. The spatial magic was crude now, a tear barely large enough to put an arm through, but Beelzebub had once folded entire battlefields with that same fundamental principle, and there was no reason, given enough time and enough patience, that Aurelian couldn't eventually do the same.
He had lost a system built by someone else's hand. In exchange, he had gained the entire raw inheritance of something that had once shaped the world's history with its own two hands, unmediated by any interface, unbounded by any quest log.
Aurelian Numen sat alone in a borrowed cellar beneath a tailor's shop in a city that had no idea who he was, flexed a hand that had been built from black smoke and demonic fire less than a week earlier, and allowed himself, for the first time since the vault had exploded around him, something that felt almost like anticipation.
Whatever came next, he would not be walking into it weaker than before.
He would be walking into it as something the world had never quite seen.