Humanoid figures of animated ice and frozen flesh that emerge from the Pale Peaks during deep winter, drawn northward toward heat and life. Frostwalkers are not undead in the traditional sense. They show no connection to Malstaris or the shadow plane, no road runs down to the dead beneath them, and no necromancer reads an ending on one. Neither are they alive. The Fengruk classify them as cold-animated, a category that exists mostly because nothing else fits. The modern Kethic account agrees with the Fengruk on the plain fact and names the cause differently: a frostwalker is a body whose threads have been displaced by cold.
What the cold took
A living body is bound by three threads. The soul lifts to the Astral when the flesh gives out, the shadow goes down to Malstaris, and those two together are the life. The third is the spirit, the self and the name, which passes to Celestia and holds only as long as someone still speaks the name. Cold-Kethic, the water element gone to ice, has worked into that set and taken the place of part of it. Where a soul or a shadow should sit there is cold instead, and cold will not do the work those threads were meant for. In some the cold lodges in the spirit, so the self that drives the body is half ice. In others it displaces part of the life-pair. The wrongness is the same either way. The threads that should carry a frostwalker out of life are tangled with an element that answers Pelus and not death, and the body cannot finish the passage those threads were for. So it stands, and walks, and goes looking for heat.
Appearance
A frostwalker resembles a humanoid corpse preserved in ice. The flesh is blue-gray, frozen solid, covered in a rime of frost that never melts regardless of ambient temperature. The eyes are pale, pupilless, and emit a faint cold light. Movement is stiff but purposeful. They do not shamble like rotting undead but move with the deliberate precision of something that feels neither pain nor fatigue.
Most frostwalkers appear to have been human or dwarven in life, though specimens have been documented from nearly every humanoid race. Their clothing and equipment, when present, dates to many different historical periods. The Pale Peaks have been producing frostwalkers for a very long time. Some wear armor styles the Fengruk do not recognize.
The cold radiates from them. Standing within ten feet of a frostwalker drops the ambient temperature noticeably. Standing within arm's reach risks frostbite from proximity alone.
Behavior
Frostwalkers are drawn to heat. They emerge from the Pale Peaks during the coldest months, when the Shrapnel Strait freezes and provides crossing. They move north in groups of three to twelve, following the warmest paths they can detect, which usually means heading toward settlements.
When a frostwalker reaches a heat source, it attempts to extinguish it. Fires are smothered. Warm-blooded creatures are killed. Buildings are frozen from the inside out. The frostwalker doesn't eat, doesn't rest, doesn't speak. It simply eliminates heat until there's nothing warm left, then moves on to the next source.
They don't communicate, don't negotiate, and don't retreat. Frostwalkers that encounter resistance fight until destroyed or until their targets are frozen. They show no fear, no pain response, and no self-preservation instinct. The only way to stop one is to destroy it.
Frostwalkers can sense heat at significant distances, at least several miles by Frostwatch reckoning. They navigate unerringly toward the warmest targets available, which makes settlements particularly vulnerable. A single frostwalker that reaches a village will systematically work through every building until nothing warm remains.
Origin
The Fengruk believe frostwalkers are corpses animated by whatever force rules the polar waste beyond the Pale Peaks, the bodies of explorers, animals, and possibly indigenous peoples who died in the south and were somehow preserved and set moving. The belief is old and widely held, and the Fengruk live by it whether or not it is true.
Its support is real enough. Frostwalker equipment spans many historical periods. New frostwalkers sometimes appear wearing gear from recent expeditions. And there are no frostwalkers anywhere except on the approach to the Pale Peaks. Whatever makes them works only in the far south.
The modern Kethic frame reads the same evidence through the ground rather than through a will beyond the Peaks. Water carries no surface seam the way Fire's Yolus does. What it has instead is a habit of pooling: its Kethic concentration sinks into the cold places and gathers there, densest where the element runs closest beneath the surface. The Pale Peaks and the cold reaches of the deep south are soaked through with it, ground saturated with cold-Kethic the way a marsh is saturated with water. A body left long enough in ground like that does more than freeze. The cold works into its threads, displaces them, and raises what the displacement leaves. This is why the dead of many ages walk together out of the same country. The ground that made the oldest of them is still making new ones.
The deep cold that does this is far older than any winter the chroniclers dated. But the Frost Fall, the century and a half when Pelus leaned close against the world and would not draw back, left the southern ground colder than it found it, and the cold-Kethic pooled beneath the south has run deeper ever since. Frostwalkers have been more numerous in the generations after the drift, and they have pressed farther north. Whether the Cold That Hungers, the entity Fengruk mythology blames for the death of the titan Vorukar, is the source of the saturation or only another thing the cold has produced, no one has settled. The Fengruk story and the Kethic argument agree at least on leaving the question open.
Combat
Frostwalkers are dangerous but not invincible. Their frozen flesh is hard, equivalent to dense wood or soft stone, but it yields to sustained attacks. Fire is particularly effective. A frostwalker exposed to significant flame takes damage rapidly and can be destroyed in minutes.
The primary threat is their cold aura. Combatants who engage in melee range risk frostbite and hypothermia, with the risk increasing the longer engagement continues. The Frostwatch addresses this through thermal gear, limited engagement windows, and tactics that emphasize ranged combat and fire.
Frostwalkers fight with whatever weapons they carried in life, swords, axes, bare hands. Their strength is considerable; the freezing process seems to enhance physical power while eliminating fatigue. They feel no pain and ignore wounds that would incapacitate a living creature.
Destroying a frostwalker requires reducing its body to fragments. The cold animation persists as long as significant mass remains connected. A frostwalker missing both arms will continue attacking with kicks and bites. A frostwalker reduced to a torso will drag itself toward targets. Only complete dismemberment or destruction by fire reliably ends one.
When one is destroyed
A frostwalker can be put down. Reduce the body to fragments or burn it apart and the cold animation loses its hold and the frozen flesh goes still. But putting one down is not the same as ending it, and the gap between the two is where the real strangeness of the thing lives.
A frostwalker's threads are compromised, half-given to a cold that will not release them, and when the body comes apart those threads cannot take their roads. Set that against the other bound things the elements leave behind, because the contrast is the whole of it. A destroyed cinderbound leaves a remnant that burns, a patch of fuelless heat fixed to the threshold where it fell. A galebound scatters on the wind and haunts no place at all. An hourbound holds its place but comes loose from when, its passage running late or early or stalled. A frostwalker does none of these. Its roads freeze. The cold that displaced the threads has frozen the very roads those threads would travel, so that nothing departs and nothing scatters and nothing lingers out of its proper time. The passage locks, and stops. There is no warm threshold to learn and avoid, no bad wind to stay out of, no figure walking a road three winters late. The cold closes over the place the threads would have gone, and they go nowhere at all.
This is the other reason a broken frostwalker leaves so little for the Fengruk to study. A cinderbound leaves its heat and an hourbound leaves its mistimed walker, but a frostwalker leaves only frozen flesh going quiet, with whatever it was sealed where it stands.
Laying one to rest is harder than for the cinderbound, which can at least be carried to the World Fire seam and drained back into Yolus. Cold-Kethic has no seam to drain into. It only pools, and there is nowhere to send a frozen road. The one rest anyone names is a Void-working, a shaper of Nilus able to un-make the cold fused into the threads so that the locked roads loosen and what remains can take whatever passage is left to it. Such shapers are few, and the Fengruk have produced none that anyone records. So a frostwalker is destroyed, and left frozen where it falls, and that is the end of it as far as the living can reach.
Frostwatch Tactics
The Frostwatch has developed specialized methods for frostwalker engagement:
Thermal lances project concentrated heat, effective at destroying frostwalkers from a distance. The lances require fuel (alchemical compounds that burn hot enough to affect frozen flesh) and have limited duration.
Fire pits are maintained along likely approach routes. Frostwalkers that encounter fire often pause, apparently confused by a heat source they cannot extinguish by conventional means. This creates engagement windows.
Containment is sometimes preferable to destruction. Frostwalkers can be trapped in ice-houses, structures designed to contain them without providing heat worth pursuing. Trapped frostwalkers eventually become dormant, though they reactivate immediately if heat enters their containment.
Rotation is essential. Prolonged exposure to frostwalker cold causes cumulative damage even through protective gear. Frostwatch engagements are timed, with fresh teams cycling in before cold exposure becomes dangerous.
Incursion Patterns
Frostwalker incursions follow predictable patterns tied to the winter freeze:
Early winter brings isolated scouts, individual frostwalkers or pairs that test the ice and probe north. The Frostwatch eliminates these before they can identify settlement locations.
Deep winter, when the strait freezes solid, brings larger groups. Three to twelve frostwalkers crossing together is typical; larger formations are rare but documented. The Frostwatch maintains constant patrols during this period.
Late winter occasionally brings mass incursions, dozens of frostwalkers crossing in coordinated waves. These events are rare (roughly once per generation) but catastrophic when they occur. The Frostwatch responds with general mobilization and fire-line defense.
The Fengruk have never determined what triggers mass incursions. They don't correlate with weather severity, stellar alignment, or any other factor the Fengruk have identified. The frostwalkers simply come when they come, and Azanfrain exists to stop them.
Hooks
The Warm One: A frostwalker has been captured that radiates heat instead of cold, otherwise identical but reversed. The Frostwatch doesn't know what to do with it. Some want to study it; others want to destroy it before it causes whatever disaster its existence portends.
The Recognition: A Fengruk veteran recognizes a frostwalker's face, a friend who died on an expedition twenty years ago. The friend is wearing the same gear, carrying the same weapons. What happened to the expedition, and what does this frostwalker remember?
The Early Crossing: Frostwalkers have appeared before the strait froze. They walked across the water, and it froze beneath their feet as they moved. This has never happened before. Something has changed in the Pale Peaks.