Gristle-Vat

At a glance: Mycelial Spore Host biomass reservoir · digests battlefield dead into host-slurry for a local breach · not a Choir repeater; burning it starves the wave instead of severing it · appears in Deadlane / Scourge-Survivors / Rothulk.

The Scourge does not keep graves. It keeps stomachs.

A Gristle-Vat is the thing a breach grows when the killing has lasted long enough to become infrastructure: a wet, rooted reservoir that takes every body the swarm can drag back and renders it down into usable host-mass. A Sower spends a corpse immediately, quill to spine, and throws it back into the fight before the blood cools. A Gristle-Vat is slower and worse. It is the pantry behind the wave, the reason a front that should be empty at dawn is coughing up fresh hosts by night.

It is not malice. It is inventory. CANON says the parasite is host-dependent and burns through biomass faster than it can replace it; the Vat is that arithmetic made visible. Corpses go in. Slurry comes out. The local breach stays fed another hour.

That is why the Pyre burn them even when the repeater is still singing, and why the Wardens will spend a whole battery flattening one organ behind the line instead of shooting the wave in front of them. A dead repeater severs the Choir. A dead Vat does something quieter and crueler to the Scourge: it makes the need keep needing.

Behaviour

• Rooted resource organ. Grows behind an active push, inside a breach chamber, under a lane-floor, or in the gut of a beached hulk like The-Rothulk. It does not walk. It spreads tendril-roots through corpse piles, drains them, and stores the mass in a swollen central sac.
• Feeds the front, not the mind. A Gristle-Vat carries no Choir node and coordinates nothing on its own. If the local Chorister or Cantor dies, the Vat keeps digesting feral and blind because hunger does not need orders (CANON).
• Turns losses into endurance. While it is fed, nearby breach growths knit faster, spent waves come back thicker, and half-grown Rippers or Spitters can be coughed out of the sac as ugly reinforcements. It is spawn economy in flesh.
• Starvation target. Burn or rupture the Vat and the local front starts to thin. Existing Scourge stay lethal, but new hosts come late, malformed, or not at all. This is the starvation prong of CANON section 6: deny it hosts and the local front withers.
• Defended by logistics. The Scourge screens a Vat with Sowers, Cairns, and common swarm because losing one means the area stops paying for itself. It will abandon ground before it abandons a full stomach.
• Rupture is dangerous. Killing the sac with sloppy fire can spill half-digested host-mass into a last convulsive spawn. Fire, cautery, or a clean core shot prevents the spill from getting back up.

Gameplay Read

• A resource objective, not a duelist. It does not make the horde smarter the way a repeater does; it makes the horde last longer. Players should understand the difference at a glance: green signal pulses mean Choir, wet swelling mass means food.
• Creates a strategic choice: shoot the enemies currently killing you, or reach past them to burn the thing that is making the next wave possible.
• Telegraph: dragging tendrils pulling bodies inward, a belly-sac swelling brighter as it feeds, and half-formed limbs pressing against the membrane before a spawn cough.
• Counter-play is denial. Clear bodies before tendrils reach them, burn corpse piles, or hit the weak core before the sac gets full. The win is less dramatic than severance and often more important: the room stops refilling.

Visual Motifs

• A huge, rooted digestion organ - more stomach than monster - grown from Mycelial Spore Host fibre, host cartilage, and black chitin hoops sunk into the ground.
• A translucent belly-sac packed with silhouettes of half-rendered bodies, bone fragments, armor scraps, and toxic-green slurry. The glow is a food signal, not a Choir broadcast.
• Corpse-dragging tendrils spread across the floor like roots, hooked into dead hosts and broken machines. The network reads as intake, not communication.
• A hard weak core under the sac where digestive ducts converge, bright enough to be the “shoot here” answer but protected by ribs of chitin and scavenged bone.
• Rupture seams weeping green-black sludge; the edge between host material and parasite growth should feel industrial, anatomical, and foul.

Sprite Brief

• Views: front, side, back.
• Silhouette must read as stationary, swollen, and rooted - instantly distinct from the tall relay-mast Chorister, the walking wall Cairn, and the crawling harvester Sower.
• The belly-sac and buried core are the focal points: sac for threat state, core for kill target.
• Feeding state: tendrils taut around fresh bodies, sac distended and glowing.
• Rupture state: membrane split, half-formed hosts spilling out, core exposed for cautery.
• Must stay readable in Deadlane’s high camera and Scourge-Survivors / Rothulk side or close framing.

Prompt Seed

Scourge biomass reservoir creature, mycelial spore host grown into a huge rooted digestion organ, swollen translucent belly-sac packed with half-rendered bodies and bone fragments in toxic-green slurry, black chitin hoops and scavenged bone ribs protecting a bright buried weak core, corpse-dragging tendrils spread across the floor like roots, rupture seams leaking green-black sludge, stationary stomach-monster behind a breach wave, blood and rust and gunmetal, DOOM-like heavy shadows, no neon.

Appears In

• Deadlane - a breach-side economy objective behind the wave. Leave it feeding and the next push arrives thicker; burn it and the lane’s pressure drops because the local front is being starved, not severed.
• Scourge-Survivors - a room that refuses to empty until the Purger finds the Vat, burns the corpse piles, and cauterizes the sac before it can cough the dead back into the fight.
• Rothulk - stomach chambers inside the beached hulk: platforming through tendril-roots and rupture sacs to starve the living ship before the climb to its core.