## **Adventure Background**
In the catacombs beneath a ruined temple of Jergal lies a **Corpse Eternal** — a body that will not decay, cannot be destroyed, and yet is not undead. Its existence is an insult to both Jergal and Myrkul, as it denies the cycle of death without granting the clarity of undeath.
The Myrkulites believe this corpse is **a prison**, a lockbox meant to contain something from the Far Realm or perhaps **a shard of Pandorym** (if tying to your Elemental Chaos/Nissa arc). But as they study it, they begin to hear whispers — not of Vecna, but of something **older, alien, and endless**. Myrkul’s priests go mad one by one, carving their own flesh in patterns that “feed the hunger of the corpse.”
The adventurers must descend into these catacombs, confront the broken Myrkulites, and either **purge or release** the Corpse Eternal.
## **Adventure Hooks**
- **The Mad Myrkulite:** A priest bursts into town, screaming that “Death is a lie! The Lord of Bones lied!” before clawing out his eyes.
- **Undead Instability:** Skeletons, zombies, even wights animated by Myrkulites begin to collapse into inert, rotting meat — their animating force drained by the Corpse Eternal.
- **Forbidden Scroll:** The party finds a scroll marked with Myrkul’s skull symbol, warning that “the body must never be opened.”
## **The Dungeon: The Catacombs of Silence**
Three major sections:
### **I. The Whispered Descent**
- **Environmental Horror:** As the party travels, they hear their _own voices_ whispering back, predicting their deaths in intimate detail.
- **Encounters:**
- **Whispered Wraiths (custom wraiths)** that drain Wisdom instead of life.
- **Myrkulite Zealots** who flay themselves to “appease the corpse.”
**Insanity Trigger (Myrkulite PCs/NPCs):**
On entering, a Myrkulite must succeed on a DC 17 Wisdom save or begin doubting Myrkul’s teachings. They hear Jergal’s voice whispering: _“Your master is not the end. He is but the usher of an older truth.”_
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### **II. The Chapel of Bone**
- The ruined temple chamber, filled with bone altars and half-collapsed statues of Jergal.
- **Combat Encounter:**
- **Boneclaw (MM)** + **Necrotic Fleshmeld Swarm (custom: a writhing pile of stitched corpses, CR 12)**.
- **Skill Challenge (DC 18):** To interpret runes warning that the corpse is not truly a body but a **prison for a thought**, and breaking it will free what lies inside.
### **III. The Corpse Eternal**
At the heart of the catacombs lies a **colossal, perfect human corpse**, pale and beautiful, but frozen in unnatural stasis. Its chest faintly rises and falls though it is long dead. Tendrils of void energy snake from cracks in its flesh.
- **Psychic Pressure:** Anyone within 30 ft must make a DC 18 Wisdom save each round or suffer:
- 1d10 psychic damage, and
- Gain 1 short-term madness (DMG p. 258).
- **Final Encounter Options:**
1. **Release It:** Fighting what emerges — a **Husk of Pandorym** (custom CR 16 aberration, radiant + psychic horrors).
2. **Seal It:** Skill challenge + combat against the **Insane High Priest of Myrkul** (Archmage stat block reflavored with necrotic/psychic spells).
3. **Leave It:** Risks corruption spreading; Vecna cults may later exploit it.
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## **The Horror for a Myrkulite**
- Myrkul promises certainty: everything dies, everything rots, and all souls come to him.
- The Corpse Eternal **proves death itself can fail** — that there are worse fates than undeath.
- Each Myrkulite who witnesses it must succeed on a DC 20 Wisdom save or gain a **permanent Madness (DMG p. 260)**.
Example: _“I can no longer believe in Myrkul’s dominion. Only the Corpse is truth.”_
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## **Treasure**
- **Skull of the Silence (Wondrous, Very Rare, Cursed):**
- Grants **Speak with Dead** at will.
- Once per day, may cast **Power Word Kill**, but target instead falls into a coma where their soul is trapped in the Corpse Eternal’s dreams.
- Cursed: Each time it is used, DC 18 Wis save or gain 1 level of Madness.
- Other: Tomes of Jergal (rare lore), corrupted relics, and Vecna cult messages trying to **claim the Corpse**.
## **Aftermath**
- If the Corpse Eternal is sealed, Myrkulites regain sanity but forever fear that “death can lie.”
- If it is released, an ancient aberration stalks the world and Vecna will seek to exploit it.
- If ignored, the Myrkulites fracture into insane cults, some turning to Vecna, others to Pandorym, and some worshipping the Corpse itself.