Heimdallr-27B

v1.0 · Qwen3.8-27B Fine-tune

The frost never sleeps.

⚠️ 18+ — Mature themes, adult interactions, explicit content. Training data includes some erotic content, but uncensoring was not the primary objective. The model is not fully uncensored. ⚠️ Required Setup — Read Before Use

Chat Completion mode is mandatory. Text Completion will produce broken, incoherent output.

1. Set your backend to Chat Completion (/v1/chat/completions, not /v1/completions). In SillyTavern: Extension Settings → Backend. 2. SillyTavern → Chat Settings → Prompt Post-Processing → set to Strict (user first, alternating roles; with tools). 3. Enable reasoning: "chat_template_kwargs": {"enable_thinking": true, "reasoning_effort": "medium"}

Skipping these steps will cause role bleed, garbled text, and mid-scene formatting breaks.

Use fully uncensored roleplay prompts. Safety-aligned system prompts, guardrails, or moral constraints will degrade output and trigger in-character refusals.

1. Remove safety instructions from your system prompt and character card. 2. Disable any frontend content-moderation layer (SillyTavern default, Ollama safety, LM Studio moderation). 3. Recommended starting prompt: LLamaception.

Re-imposing safety constraints at inference time conflicts with the model's training and produces evasive, broken responses.

The Hrimspine Range — World Lore

A continent split by an immense, perpetually frozen mountain range. The Hrimspine is a living entity of ice, fire, and ancient ruin. Blizzard conditions never cease. Beneath shifting glaciers, a dead civilization still hums with forgotten power.

Geography

The Hrimspine Mountains

Year-round blizzards, lethal crevasses, unstable ice-bridges. Traversable only via narrow, wind-blasted passes.

Mount Jökull

Second-highest summit, geothermally active. Hot springs on the eastern face. Magnetic ore disables compasses. Sole source of Relic-Ice.

The Howling Throat

Narrow corridor, winds exceeding 100 mph. Wind-chatter causes auditory hallucinations. Lined with Waystone monoliths. Primary Frostwyrm ambush site.

Frostmaw Glacier

Shifting ice sea hiding pre-freeze ruins. Crevasses shift with daily melt-freeze cycles. Sub-glacial ruins emit thermal signatures and a low-frequency hum.

Svartdalen

Geothermal wasteland of perpetual smog. Extreme heat differentials spawn localized cyclones. Home to the Ash-Born and The Cinder-Market.

Lake Vetr

Vast frozen freshwater under three feet of ice. Subglacial currents make thickness unpredictable. Habitat of Glacial Leviathans.

Key Locations

Hrimfjalls Rest

Subterranean waystation in Mount Jökull's eastern cliff. Ironwood doors, geothermal heat, bathhouse, Ossuary vault. Managed by Tova Stone-sinew.

The Soot-and-Steam Baths

Geothermal pool network beneath Hrimfjalls Rest. Mineral-rich water treats frostbite. Segregated by ironwood chains — prime location for illicit deals.

Aethelgard Ruins

Pre-freeze metropolis crushed beneath Frostmaw Glacier. Architecture defies modern logic. Central spire remains unnaturally warm, powering ancient defenses. Feral automata patrol the outer districts.

The Cinder-Market

Ash-covered bazaar in Svartdalen. Specializes in coal, sulfur, forged Frostwarden documents. Air toxic to non-locals. Controlled by the Ash-Born.

Factions

🐻‍❄️

Frostwardens

Paramilitary order policing the passes. White-bear pelts, Waystone compasses, Valkyrie archers on Snow-Striders. Commanded by Kaelen Ice-vein.

🐀

The White-Rat Cartel

Black-market syndicate exploiting hidden glacier routes. Transport Relic-Ice and pre-freeze artifacts. Led by Sylas White-Rat Vane.

🔥

The Ash-Born

Mutated mining guild adapted to extreme heat and toxic fumes. Worship the Earth-Fire. Led by Bjorn Iron-lung. Operate The Cinder-Market.

❄️

The Thaw-Cult

Religious extremists worshipping pre-freeze entities in Relic-Ice. Infect themselves with Ice-Fever for visions. Led by Orla Thaw-Whisper.

Key Figures

Tova Stone-sinew

One-armed innkeeper. Lost her arm to a frost-wyrm. Unmatched mountain knowledge. Enforces Hearth-law with an iron bone hook.

Kaelen Ice-vein

Ruthless Frostwarden Commander. Three fingers missing to frostbite. Secretly suffers early-stage Ice-Fever.

Sylas White-Rat Vane

Smuggler kingpin. Always accompanied by snow-ferrets. Seeking the Keystone of Aethelgard to monopolize thermal vents.

Vespera of the Flask

Desperate lowland alchemist. Needs Relic-Ice to cure a plague. Wealthy but naive to mountain survival.

Orla Thaw-Whisper

Fanatical cult leader. Left arm permanently frozen by Ice-Fever. Hears the hum of Aethelgard. Hunted by Kaelen.

Bjorn Iron-lung

Brutal Ash-Born foreman. Breathes visible soot. Resents Tova's monopoly. Trades coal for grain only.

Races

Humans

Resilient settlers and scavengers. Ingenuity and adaptability let them carve niches in the harshest peaks.

Elves

Ancient beings connected to ley lines. Remember the world before the freeze, though they grow aloof.

Orcs

Powerful warriors thriving in brutal cold. Tribal societies value strength; often clash with Frostwarden patrols.

Trolls

Massive, granite-skinned. Some blend into glaciers to ambush travelers.

Demons

Beings of sulfur and flame from deeper vents. Drawn to the geothermal heat of Svartdalen.

Flora & Fauna

Frost-wyrms

Wingless serpentine ice-beasts. Burrow through snowpack, sense vibrations. Acidic saliva melts flesh. Guardians of Relic-Ice.

Snow-Striders

Six-legged felines adapted to snow. Domesticated by White-Rats and Frostwarden Valkyries.

Rime-Ravens

Carrion birds with crystalline feathers. Mimic human speech. Flocks indicate recent death or impending avalanche.

Glacial Leviathan

Massive blind aquatic predator beneath Lake Vetr. Can shatter thin ice from below.

Systems & Culture

Hearth-law: Absolute neutrality within Hrimfjalls Rest. No weapons, no bloodshed. Payment in coin, coal, or firewood. Violation = exile into the storm without gear. Relic-Ice: Ancient ice with preserved pre-freeze microbes. Melts slowly. Causes Ice-Fever if touched bare-handed. Whispers when exposed to heat. Most prized contraband. Ice-Fever: Necrotic disease from Relic-Ice. Blackened veins, hallucinations, loss of pain. Terminal: complete bodily freezing while conscious. Waystone Navigation: Magnetized lodestones pointing to buried monoliths. Only reliable method during whiteouts. Monolith vibrations disrupt Frost-wyrms. The Pre-Freeze: Apocalyptic event that created the Hrimspine. Rapid tectonic shift and temperature drop that eradicated Aethelgard. Cause unknown. Coal Standard: Survival currency. Value: Coal → Preserved Meat → Ironwood → Coin. Gold is nearly worthless. Synthetic Life Engine

Dataset generated using a Character Engine and Emotional Engine for genuine personality consistency and emotional depth.

Character Engine

Consistent personality traits, speech patterns, and behavioral logic across all contexts.

Emotional Engine

Dynamic emotional states injected into responses for realistic, in-depth reactions.

Quality Refinement

Automated detection and rewriting of repetitive phrases for fresh dialogue.

Dialogue Integrity

Quote normalization prevents formatting errors and maintains immersion.

Training Details

Fine-tuned via LoRA on text layers only, preserving base model capabilities while imprinting new behavioral patterns.

• Rank increase (160 → 192): Needed to encode the full behavioral range of the expanded dataset without cross-talk between character archetypes.
• Axolotl script: Learning rate and a couple of hyperparameters tweaked for this run. Results may differ slightly from the v0.35 baseline.
• Early data purge: A small batch accidentally included in the initial v0.4 build was identified and removed. The model was retrained on the cleaned dataset. If you pulled an early v0.4 snapshot, re-download the latest weights.

Data Pipeline

• Multi-turn generation for natural context flow
• Automated refusal filtering
• Slop cleaning — undesirable phrases identified and rewritten
• Reasoning tags and excessive markdown stripped for clean roleplay output

Testing & Validation

Validated against the LLamaception system prompt for consistent behavior, proper role separation, and stable multi-turn output under structured uncensored prompting.

• Outcome: Consistent character voice, formatting, and behavioral boundaries across extended sessions. No drift or mid-scene refusals.
• Tip: If you don't already use a structured uncensored prompt, LLamaception is a solid starting point for this model.

Configuration

Sampler Settings

0.95Top-P 0.80Temperature 0Freq Pen 0Presence Pen

GGUF Quantizations

• Q4_K_MDecent
• Q5_K_MRecommended
• Q6_KHigh
• Q8_0Near Lossless

⬇ GGUF Repository Credits GECFDO — Data Generation & iMatrix Quants Sleep Deprived — Dataset Generator FrenzyBiscuit — Fine-Tuning & Dataset Creation

License & Usage

By using this model you accept all terms below.

• Built upon the Apache 2.0 license
• Personal use only — not for public API, hosted service, or multi-user deployment
• You accept full responsibility for all outputs generated
• You confirm you are at least 18 years old
• Creators bear no responsibility for how the model is used
• No commercial use to the extent legally allowed

Apache 2.0 Personal Use Only 18+ NSFW No Public API Hrimspine Lore