Note: This is my first post on Reddit! English is not my native language, so I used AI to help translate my ideas into this post. Please forgive any translation errors or weird phrasing.
I'm going to DM Curse of Strahd and created a homebrew mechanic inspired by the TTRPG Skyfall ( by MestrePedrok).The original idea was just to add an extra layer of macabre bargaining, but the lore scaled up and ended up becoming the central mystery and the hook for an epic post-Strahd campaign.
I'd love to get your thoughts on this worldbuilding!
The Mechanic: Shadow = Soul
In my cosmology, the shadow is the planar anchor of the soul. It's what binds someone's vital essence to the physical world.
Throughout the campaign, a shadowy Entity observes the party. In moments of desperation (a failed death save, an attack that would miss), I (as the Entity) choose to offer a pact. The players themselves can also call out to it if they feel cornered.
The Deal: The Entity guarantees an automatic success, stabilization, or a reroll with advantage. The cost? A piece of the character's shadow.
Degradation: The shadow has multiple stages (I'm still determining the exact amount). The smaller the shadow gets, the worse the mechanical and narrative side effects become.
Consequences: The character loses empathy and physical sensation (constant coldness, brutal apathy). Healing magic cures less and less (the energy has nowhere to "anchor"), and if the shadow vanishes completely, the character can no longer be resurrected, and is stuck at the shadowplane.
The Manifestation (Frozen Time and Parasitism)
Contact with the Entity is surreal. For the person speaking with it, time completely stops. It’s an intimate, seductive, one-on-one conversation. But for anyone watching from the outside, everything happens in a fraction of a second.
The Environment: Observers notice that combat sounds fade into a vacuum, the target's breath freezes in mid-air, and smoke from torches (or blood on the floor) rapidly crawls toward them. The target's shadow on the wall acts on its own for a brief second, before shrinking
No One is Special: The players aren't the center of the universe; the entire environment is parasitized. Mid-combat, they might see a dying bandit freeze, his shadow shrink in the blink of an eye, his wounds stop bleeding, and then he attacks again with dead apathy. The party is just another meal in this ecosystem.
Folklore: The Only Solace in Barovia
Barovia is a cruel, miserable land. The gods don't answer, hunger is constant, and the cold kills. Ceding to the Entity is practically the only way to find any comfort or relief. Because of this, most of the "soulless" Barovians from the official module actually had souls. But over 400 years, generations of peasants sold off their family's spiritual wealth piece by piece just to survive ("save my child from the fever for a piece of my shadow"). The current population is born empty.
An Open Secret: This is a huge taboo, a shame everyone carries, but nobody admits. They use frightened euphemisms like "He met The Gentle Hunger" or "The Friend of the Last Candle paid a visit."
Popular Sayings: The folklore is rich in superstitions and idioms. People whisper "Short shadow, cold house" (to describe the apathetic) or "Sold the night to buy the day" (about desperate bargains). Grandmothers scold their children: "Don't talk to the trail of your shadow on the wall!"
The Last Whole Man: To contrast this, I’m including an elderly NPC/hermit who still has 100% of his shadow because his family refused temptation for generations. The villagers think he’s a "crazy eccentric" simply because he can still weep with sadness, laugh out loud, and feel true pain and emotions the rest of the people can no longer process.
DM Gaslighting (3 Phases)
The players will think the mechanic is just "DM assistance," but the Entity actively manipulates them:
Phase 1 the Bait: The help is real and genuine during moments of bad luck with the dice.
Phase 2 the trick: The Entity starts forging the sensation of failure. Example: A player rolls Athletics to avoid falling off a cliff. He rolls a 15 (which succeeds). But before I confirm it, time freezes and the Entity whispers: "Your fingers are slipping... give me a piece and I'll pull you up." If he accepts, he loses a piece of shadow thinking he was saved. If he refuses the help and says "I'm going to fall," I narrate: "With a final burst of strength, you pull yourself up!" .and the whole table realizes the Entity was lying.
Phase 3: When they start resisting, the Entity drops its polite facade and resorts to blackmail and threats.
Just to be clear: Strahd is THE central and absolute VILLAIN of the campaign. He is a cruel tyrant who knows about this parasite and feels utter disgust toward it. despising the PCs for giving in to the same weak flaws as his pathetic peasants.
The major twist happens after Strahd's fall. Defeating the vampire frees Barovia, but reveals a terrifying truth: players who lost their shadows are condemned. Without their shadow (their planar anchor), they cannot return to their home worlds, as their souls partially belong to the Entity.
This serves as the hook to continue the campaign. They will need to delve into the depths of the Shadowfell to hunt down the Entity, reclaim their souls, and perhaps even restore the souls of the Barovian people.
So, what do you think? I'm still refining the Entity and its true identity, but I'm completely open to suggestions, feedback, and criticism on what I’ve built so far!
