Sapscald - The Wood Woad
Fire is what the Shroud runs on. Bring some to this thing and you are feeding it, not fighting it.
Role in Its Society
A wood woad has no kin, no pack, and nothing that could honestly be called a society. What Sapscald has is a boundary, and the boundary is the whole of it.
The Verdant Shroud is the one place in Emberfall where the land is visibly winning. Ash-fed soil pulses with life there; roots crack blackened stone open and haul it apart a finger's width at a time; long-cooled lava flows disappear year by year under firewillow and glowing fungus and the low tangle of ash-bloom vine. Sapscald walks the seam of that work. Its ground is a wedge of the Shroud pinched between two dead flows, low and humid and so thickly overgrown that a rider has to dismount, and everything inside that wedge is in some stage of being pulled back down into the dirt.
That includes anything people leave standing. A picket line, a stacked cairn, a fence post, a wagon axle abandoned where it broke — Sapscald does not raid camps and does not steal, but a worked thing left inside its ground will be gone by the second morning and a foot under the soil by the third. Cinderglade's herders worked this out long before anyone thought to write it down. Their answer was not to fight it. Their answer was to route the herds around the wedge and to build nothing inside it, and for as long as they have kept to that, the arrangement has held.
The Shroud's own inhabitants get along with it perfectly well. Cindersloths drowse in the crooks of the trees it guards and it steps around them. Firefinch swarms scatter and re-form over its shoulders without it lifting a hand. Lava moles work the soft ground it turns over, and the flame-puffed frogs of the Burnwake Pools are noisier when it is nearby than when it is not, which is how the herders' children learned to tell where it was standing.
The arrangement has stopped holding. Since the Emberheart began weeping burning sap and the Shroud's plants turned on the people walking through them, Sapscald has been met well outside the wedge — on open grazing ground, on the vine-tangled path toward the Burnwake Pools, once within sight of a Cinderglade outrider camp. It no longer waits for something to be built before it objects to the builder. Whether the creature has changed, or whether it has simply stopped tolerating what it always disliked, is a question nobody in Cinderglade has been able to answer, and Kaelyra Flamehoof has read the flame over it twice without saying publicly what she saw.
Appearance Description
Sapscald stands a little over seven feet and is shaped, roughly and unhelpfully, like a person. The frame is braided firewillow — long green withes wound and rewound around a core of blackened root until the whole limb has the thickness and the give of a ship's cable. Over that, in overlapping slabs across the chest, shoulders and forearms, sits armour: bark that has grown out and over crusted lava rock and taken the rock with it, so the plating is half wood and half glassy black slag, fitted the way scale is fitted and about as forgiving.
Glowing fungus grows in every joint. It packs the elbows, the hip, the hollow behind the knee, the seam where the neck meets the shoulder, and it throws a soft blue-green light out through the gaps in the plating whenever the creature moves. In the deep Shroud at night that light is unremarkable — the whole underbrush glows — which is exactly the problem. The one warning anybody reliably gets is when a patch of that ordinary glow goes dark and stays dark.
It has no face. Where a face would be there is a vertical split in the wood, a knot that has healed badly, and nothing behind it that looks back. Ash-bloom vine hangs off one shoulder like a torn cloak, and emberpetal flowers have taken root along the outside of the left forearm, blood-orange and fully open, fed by the ash that settles on the creature and never quite washes off.
The sap is the thing people remember. It runs in every crack in the bark, dull orange, the exact colour of a coal seam an hour after the fire has passed. It has always run hot — hot enough that rain hisses on it and the ground steams where the creature stands too long. Cut it, and the sap beads out thick and slow and smoking, and the smell that comes off it is scorched flower and hot iron together. The feet are not feet. They are bundles of live root that spread when the weight comes down, and they leave a shallow crater in the leaf litter instead of a print.

Backstory
The Shroud grows things. That is not a figure of speech there — the soil is fertile past all reason, things put down roots in it that have no business rooting, and the land pushes back against the dead flows every single season without being asked. Once in a very long while it grows something that gets up and walks.
Sapscald is what that looks like. No one made it. No ritual raised it, no circle bound it, and it carries no sign of ever having been anything else. It has kept the same wedge of ground for longer than any living Cinderglade rider has been riding, doing the only work it appears to understand: it takes what is cut, worked, shaped, or stacked, and it puts it back under the soil where the roots can reach it.
The herders' understanding of the creature is entirely practical and, until recently, entirely sufficient. Do not build in the wedge. Do not carry a fresh-cut haft through it. Do not stop to sharpen anything. If you find the ground has taken your tent pegs overnight, take the loss and move the camp, because whatever else it is, it does not follow. It had never once been seen past the line where the eastern dead flow surfaces, and the herders treated that line the way sailors treat a reef.
Then the Emberheart began to weep. Burning sap ran down the great tree's bark and pooled in the roots, the Shroud's plants turned hostile to anything walking, and Cinderglade's sages started using the word corruption and started using the word underground, and none of them have gotten further than that. What is certain is that Sapscald came out past the dead flow. It has been seen four times now on ground it has no history of touching, and on two of those occasions it moved on someone who had built nothing, cut nothing, and was carrying nothing more provoking than a waterskin.
It is a poor witness. It cannot be questioned, it does not appear to want anything, and its sap ran hot long before the Emberheart's did, which means the resemblance proves precisely nothing. The sages who have gone out to look at it have come back with a fuller description and no more understanding than they left with. It is the most visible thing that has changed in the Shroud, and it explains none of why.