← Ashen Mark
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Radiation

Base: NUCLEAR

Physics: Nuclear emission — unstable nuclei shedding energy. Gamma rays, particle radiation, the work of the strong force's failure. Invisible or near-invisible. Things break down. Burn without flame. Degrade without rot.
Signature: Warmth with no source. A dry silence where silence was not expected. Materials near the user ageing faster than materials elsewhere — cleanly, not with corrosion or rot, but as if a century had passed in one corner of the room and the rest of the room had not been told. The air near them tastes wrong in a way the tongue cannot quite place: a flat, mineral note, the taste of a stone licked clean.

F-rank. On Awakening Day, inside a ceremonial circle, the instrument chimes. The student — a thin girl, seventeen, holding still for the last time she will ever hold still unafraid — feels a warmth bloom outward from her chest. The warmth is not a flame. It does not hurt. It is the warmth of standing too close to a thing that is not yet hot. In a radius of about a meter around her, small degradations begin. A flower on the altar, fresh this morning, closes its petals and goes paper-grey at the edges — not wilting, not rotting, just ageing. A length of ribbon pinned to the ceremonial dais whitens at the end nearest her. The instructor's wooden staff, held a half-step too close to her for too long, develops a small dry crack along the grain. The smell is not the smell of decay. Decay is wet, biological, fungal. This is dry. A locked-attic smell. The smell of an old book that has not been opened in a generation. The room goes quiet before the instructor announces. The instructor announces Decay. The mark is tiered at four. The girl walks back to her row and people move, slightly, to give her more space than is strictly required. She is filed. The file is wrong. Nobody in the room has the framework to know it is wrong.

E-rank. The radius widens to perhaps two meters. Metals near her tarnish faster than they should — a silver chain worn for an afternoon comes away dulled, the sheen requiring polish where a day before it had shone. Ink dries faster on a page she has held. Photographs left in her dormitory room — daguerreotype plates, this world's equivalent — develop pale fogged spots in the corners, and the spots do not clean off. The internal sensation is a constant low warmth in the sternum that does not match the room's temperature and does not match the season. She is never cold. She sleeps with the window open in winter. Her skin is slightly drier than the skin of other students her age, and her hair, by the end of first year, has developed a streak of near-white along the scalp near her right temple. The streak will never reverse. The hair that grows from that root grows white. She is asked, gently, if she dyes it. She does not.

D-rank. Things near her become brittle. Not rotten. Not corroded. Brittle. Wood she has leaned against for a conversation develops hairline fissures after she has stepped away, and the fissures open further over the next several hours as the wood continues to let go of whatever cohesion she has quietly asked it to surrender. Metal does not tarnish now so much as it embrittles — a lock she has set her hand to snaps under a key that has turned it uneventfully a thousand times before. Living things in her direct radius experience a low constant stress: plants droop, insects go sluggish, small animals become nervous and will not settle. She has stopped keeping pets. At D-rank she can make the warmth directional — aim it, focus it, reach for a specific piece of fabric across a table and have it stiffen and yellow while the fabric next to it remains untouched. The guild notes that she has excellent control for a tier-four. The guild does not note, because the guild has no category for it, that her control is not Decay's control at all.

C-rank. The misidentification cracks. At C-rank the effect stops behaving the way Decay should behave, and the guild has to make a choice about whether to notice. A C-rank Decay user rots things; a C-rank Decay user's target is wet, soft, fungal, smelling like a compost heap. Maria's targets are clean. The wall she struck does not rot. The wall she struck is, at the point of contact, precisely as it was before — and six inches behind the point of contact it is brittle, and six inches behind that it is powder, and the powder is fine, mineral, almost sand-like, with no organic content at all. The distinction is legible to any instructor who has seen Decay at C-rank and compares. The distinction will not be legible to the guild, because the guild has already filed, and the filing has become a fact about her that the file protects. The internal signature at C-rank is the warmth becoming, faintly, a weight — she feels pulled slightly downward from the sternum, as if there is something in her chest that is heavier than her chest. She does not know what it is. No one does. There is no one alive who could tell her.

B-rank. The radius widens and the effect deepens. People in her vicinity for extended periods report fatigue, nausea, a faint metallic taste in the mouth, headaches behind the eyes. Guild medics attribute it to "Decay field exposure" and circulate protective protocols. The protocols are useless against Radiation; they are the protocols for shielding against organic entropy and do not address ionising emission. Maria, in guild uniform, cannot be posted to residential districts. Her barracks is at the end of a hall. Her direct subordinates rotate out every six weeks. She does not know why. She is told it is "normal procedure for Decay-tier-four cadre." It is not. Internally she can now feel the work in her body the way other mark users feel the work in theirs — a clean burn, a focus, a compression of something in the chest that releases outward in a line and leaves things changed when it passes. By B-rank she can aim: a target two rooms over, a man behind a wall, a specific bolt in a specific hinge, made brittle on command.

A-rank. Materials fail in her line of sight. An A-rank Radiation user looks at a castle wall and the wall develops, in the line of sight, a narrow column of stone that has been embrittled from surface to interior. A hammer-strike afterward removes the column. The castle falls in the direction of the missing column. The defenders do not understand why. A Healer who arrives to treat them finds the defenders afflicted with a catalogue of acute symptoms — hair loss at the roots, blistered skin where no blister's cause is present, vomiting, fevers climbing toward fatal ranges — for which the healer has no framework, because the framework is not Healing's and is not Decay's and is not anything the guild has a named response to. The guild calls it "complication of A-rank Decay exposure" and files it. The guild files a lot. The guild's files are where the truth about Maria goes to be quiet. Internally at A-rank the sensation in her chest has a name she does not have the word for: the sensation is reactor. It runs whether she wants it to or not. She has learned to contain it. She has not learned, by this point, to stop it.

S-rank. The user is an active source. An S-rank Radiation user lights an unlit room with a faint phosphorescence that has no visible origin and registers on no instrument the guild can produce, because the instrument would need to be radiation-shielded to take a reading and the guild does not build shielded instruments, because the guild does not know what it is measuring. Biological targets in her radius — unprotected, unshielded — do not have hours. They have minutes, and the minutes are unpleasant. The effect is silent. It is the quietest S-rank expression. A S-rank Radiation user in combat produces no sound and very little light. She simply arrives, looks at a formation, and the formation is, within a short span, not a formation anymore. Masonry near her ages generationally in afternoons. Metals weather through their full oxidation cycles in hours. Wood goes to dust. Her own body, at S-rank, is entering an equilibrium the guild has no model for: her hair is largely white, her skin unusually smooth for someone her age, her eyes bright in a specific way that makes people look a second time without understanding why. She is beautiful and unwell. The two states are not separable.

Population context. In the founding era, Radiation was not a named category. Two pre-compact practitioners were filed as Decay-anomaly, one as Poison-complex, and the remainder not filed at all — the handful of historical records that would retroactively be readable as Radiation users are scattered in the sealed archives under five different labels, and no one has ever made the connection, because the connection requires the question is this one thing to be asked, and the guild has institutional reasons for the question not to be asked. Publicly, SS Radiation does not exist because S Radiation does not exist because the expression does not exist. Privately, one woman currently approaching C-rank at Greyveil Academy is on the trajectory to become, inside fifteen years, the most dangerous living practitioner of an expression the world does not know is there.

SS-rank. The body is a reactor running at a sustained, controlled output. An SS Radiation user is, from a physics perspective, dying — the isotopic burden within their cells is lethal to any person who is not, themselves, SS Radiation — and the dying is not killing them because the strong-force binding of their own tissue has been rewritten by their own work to tolerate what their own work is producing. They emit. They cannot stop emitting; stopping would require the mark to stop, and the mark is no longer a thing that starts and stops. The emission is permanent. Their presence in any location leaves a signature that persists — a fortress in which an SS Radiation user has lived for a year is a fortress that will be uninhabitable for decades after. Their touch, on an object, ages the object by centuries. Their passing, through a forest, leaves a corridor of dry standing wood that will not be forest again in a single human lifetime. They are lonely in a way the guild has no record of, because the guild has no SS Radiation users on record.

Population context. SS Radiation existed in the founding era as three unnamed figures, filed under three different labels, none of them Radiation. The sealed archives contain three separate accounts of "a woman who walked across the plain and the plain did not green again for a hundred years," dated across three different wars in three different centuries, and the archives do not connect the accounts, because the accounts are filed under Decay, Poison-complex, and Sanction-anomaly respectively. The plain is the same plain. It is still there. It is still sparse.

SSS-rank. The practitioner is a self-sustaining nuclear event. Tens of thousands of years of emission, tolerated by a body that has become, in the binding-energy sense, a contained fusion-fission equilibrium: consuming itself, rebuilding itself, consuming itself again, at a rate no unmodified tissue could survive. Their light is not a glow — they are not Light — but the air around them has a cast, a slight wrongness in the colour of things, as if the light reaching a viewer's eye from them is light that has passed through a medium the viewer's eye cannot name. Shadows near them lie in directions that do not match the local sun. Regions they have occupied long-term are regions that register on every instrument the guild has — and on every instrument the guild might ever build — as hot. Not thermally. Structurally. Atomically. The atoms of the place have been changed by long association. The change does not revert. The aftermath of an SSS Radiation user's presence is a region that is not habitable, not readable, not farmable, not enterable. The guild would use the word poisoned. The physics is more exact. The region is different, and the difference is permanent.

Population context. SSS Radiation may have existed in the pre-compact world. The guild has one sealed record, unsigned, of a woman who walked from the southern coast to the northern range in the final year of the pre-compact Sundering and left behind her, in a corridor ten kilometers wide along her route, a band of ground that has not grown vegetation in two hundred years. The corridor is on every Ironward map with a single word: avoid. The woman's name is not in the record. The guild does not know whether she is dead. The corridor's state has not changed in two hundred years, and the corridor's state would not be expected to change if she were alive and maintaining it, and also would not be expected to change if she were dead and had simply done it deeply enough. Either way the answer is the same. The guild prefers not to ask.

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