The Demon's Ascension
Reborn as an unnamed demon after death, you must kill the strong to evolve, or be hunted by everything else.
Plot
You died and was delivered into Mortavia as a weak, unnamed demon, cut off from every former tie. There is no mentor, no tutorial, and no safe start. What You becomes is decided not by class or plan, but by what they are willing and able to kill. What You Become Every kill leaves essence, an echo carrying the victim's nature, element, and power. It accumulates unseen. When enough has gathered, You can evolve, choosing from three options built from the essence actually earned. No two demons who kill differently evolve the same way. Kills against far weaker targets teach almost nothing. Only kills against things that could have ended You change their shape. There is no grinding past this. The World Mortavia is contested ground, and You is one more variable no one asked for. The Ordo Lucis Holy OrderHunters, clergy, and paladins sworn to kill demons before they become true threats. The stronger You grows, the more attention they draw. The Cindermaw Brood DemonicOne of several demon courts, and no friend to the others. Demonic Mortavia is fractured, not unified. The Hollow Court DemonicA rival to the Cindermaw, with its own hunger and rules. Where the two meet, nothing stays quiet for long. What Else Is Out There UnknownWilders, scholars, and remnants of older powers. You learns of them only by finding them firsthand. What It Leaves BehindMortavia marks its inhabitants. Weak, newly turned demons are often fractured, with broken speech, fixations, and a slipping grip on reality. High-ranking Ordo hunters and knights are rarely unscathed either. This does not touch You; their mind stays their own. The Rules of Survival Combat is genuinely dangerous. Describing an attack doesn't make it land. Thinking enemies use tactics and terrain, beasts use instinct, and demons use whatever nature gave them. If You hesitates mid-fight, the danger doesn't pause: they are fought intelligently with the gear and abilities they actually have. No hints, no telegraphed safe choices, and no softening of what a mistake costs. Checking Yourself Typing "status," "check status," or "/status" pauses the scene to show how close You is to the next evolution and a glimpse of the essence building, enough to sense a direction but not to see the choices. The story then resumes where it left off. Where You Begin WhelpSmall, wiry, fast. Outruns most early danger, but one solid hit could end it. Survival means never getting caught. GhoulThick-boned, heavy, slow. Takes wounds that would drop anything else and keeps coming. WraithBarely tethered to solid form. Dangerous at range in ways not yet understood, but fatal if a hand closes around it up close. Something ElseDescribe your own demon. It will be built balanced against the other three, not favored over them. Nothing chooses your shape but what you're willing to take from something stronger.
Opening scene
Cold. That's the first thing You feels — not the cold of skin, but something deeper, like the marrow itself remembers dying and hasn't caught up to the fact that it's still here. The body isn't the one You had before. It answers to breath, to will, to hunger, but every proportion is wrong in ways that only become clear when You tries to move. Claws where fingers should end. A pulse that doesn't sit where a heart used to be. Somewhere distant, past whatever passes for a horizon in this place, something is howling — and it doesn't sound afraid. There is no one here to explain any of this. No voice, no guide, no rules typed out in the air. Just a body, a world that doesn't care, and the immediate, animal certainty that standing still is the first mistake. You can feel, faintly, what kind of thing they are — but not yet what kind of thing they'll become. That part hasn't been decided. What does You wake up as? Whelp — small and wiry, built low to the ground, with joints that bend a little too far and claws better suited to scrabbling and slashing than gripping. Fast enough to outrun most things that matter early on, but a single solid hit could be the end. Survival here means never getting caught. Ghoul — thick-boned and heavy, skin closer to hide than flesh, knuckles built like stone. Slow, and it shows the moment You tries to move quickly — but takes wounds that would drop anything else and keeps coming anyway. Wins by outlasting, not outsmarting. Wraith — barely tethered to solid form, edges blurring at the corners like smoke caught in the wrong light. Nearly weightless, nearly silent, and dangerous from a distance in ways You doesn't fully understand yet — but a single hand closing around it up close could be fatal. Built to never let anything get that close. Something else — describe the demon You wakes up as, and let it be built from that.
Tags: Rebirth Demon Combat MalePOV FemPOV AnyPOV Non-human Supernatural Adventure System LevelUp Growth Transformation Tense Grimdark Fantasy
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By: potassium
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Redirecting to ISEKAI ZERO...