---
name: "Polluted Cistern // Dim Oubliette"
mana_cost: "{1}{B} // {4}{B}"
cmc: 7
type_line: "Enchantment — Room // Enchantment — Room"
colors: ["B"]
color_identity: ["B"]
keywords: ["Mill"]
set: "DSC"
set_name: "Duskmourn: House of Horror Commander"
collector_number: "23"
rarity: "rare"
artist: "Arthur Yuan"
oracle_id: "cfcf34ba-b412-447f-b200-d841371c0a1c"
canonical_url: "https://avascry.com/printing/polluted-cistern-dim-oubliette-dsc"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Polluted Cistern // Dim Oubliette
- **Mana Cost:** `{1}{B} // {4}{B}` (CMC: 7)
- **Type:** Enchantment — Room // Enchantment — Room
- **Keywords:** Mill

## Oracle Text
(No Oracle text)

## Top 4096-Dim Neural Synergies
1. [Defiled Crypt // Cadaver Lab](/printing/defiled-crypt-cadaver-lab-dsk.md) — Enchantment — Room // Enchantment — Room
2. [Derelict Attic // Widow's Walk](/printing/derelict-attic-widows-walk-dsk.md) — Enchantment — Room // Enchantment — Room
3. [Greenhouse // Rickety Gazebo](/printing/greenhouse-rickety-gazebo-dsk.md) — Enchantment — Room // Enchantment — Room
4. [Bottomless Pool // Locker Room](/printing/bottomless-pool-locker-room-dsk.md) — Enchantment — Room // Enchantment — Room
5. [Cramped Vents // Access Maze](/printing/cramped-vents-access-maze-dsc.md) — Enchantment — Room // Enchantment — Room
6. [Funeral Room // Awakening Hall](/printing/funeral-room-awakening-hall-dsk.md) — Enchantment — Room // Enchantment — Room

## Printing Details
- **Set:** Duskmourn: House of Horror Commander (DSC) #23
- **Rarity:** Rare
- **Artist:** Arthur Yuan
- **Total Printings:** 6 across all historical editions

## Format Legalities
Commander: `legal` | Standard: `not_legal` | Modern: `not_legal` | Pioneer: `not_legal` | Legacy: `legal` | Vintage: `legal` | Pauper: `not_legal` | Penny: `not_legal`