Polluted Cistern // Dim Oubliette

{
  "_id": "6a38909917cee8069896d1e4",
  "oracle_id": "cfcf34ba-b412-447f-b200-d841371c0a1c",
  "name": "Polluted Cistern // Dim Oubliette",
  "image_uris": {
    "small": "https://cards.scryfall.io/small/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.jpg?1726780718",
    "normal": "https://cards.scryfall.io/normal/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.jpg?1726780718",
    "large": "https://cards.scryfall.io/large/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.jpg?1726780718",
    "png": "https://cards.scryfall.io/png/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.png?1726780718",
    "art_crop": "https://cards.scryfall.io/art_crop/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.jpg?1726780718",
    "border_crop": "https://cards.scryfall.io/border_crop/front/6/a/6a7c3370-6f79-417e-a98e-4341307e151b.jpg?1726780718"
  },
  "mana_cost": "{1}{B} // {4}{B}",
  "cmc": 7,
  "type_line": "Enchantment — Room // Enchantment — Room",
  "colors": [
    "B"
  ],
  "keywords": [
    "Mill"
  ],
  "card_faces": [
    {
      "object": "card_face",
      "name": "Polluted Cistern",
      "mana_cost": "{1}{B}",
      "type_line": "Enchantment — Room",
      "oracle_text": "Whenever one or more cards are put into your graveyard from your library, each opponent loses 1 life for each card type among those cards.\n(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)",
      "artist": "Arthur Yuan",
      "artist_id": "0c066852-6fdb-42d0-aab9-db4038850da0",
      "illustration_id": "5dcb1c05-ef22-404e-8e06-b669982e8e0d"
    },
    {
      "object": "card_face",
      "name": "Dim Oubliette",
      "mana_cost": "{4}{B}",
      "type_line": "Enchantment — Room",
      "oracle_text": "When you unlock this door, mill three cards, then return a creature card from your graveyard to the battlefield.\n(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)",
      "artist": "Arthur Yuan",
      "artist_id": "0c066852-6fdb-42d0-aab9-db4038850da0"
    }
  ],
  "legalities": {
    "standard": "not_legal",
    "future": "not_legal",
    "historic": "not_legal",
    "timeless": "not_legal",
    "gladiator": "not_legal",
    "pioneer": "not_legal",
    "modern": "not_legal",
    "legacy": "legal",
    "pauper": "not_legal",
    "vintage": "legal",
    "penny": "not_legal",
    "commander": "legal",
    "oathbreaker": "legal",
    "standardbrawl": "not_legal",
    "brawl": "not_legal",
    "alchemy": "not_legal",
    "paupercommander": "not_legal",
    "duel": "legal",
    "oldschool": "not_legal",
    "premodern": "not_legal",
    "predh": "not_legal",
    "tlr": "not_legal"
  },
  "foil": false,
  "nonfoil": true,
  "oversized": false,
  "set": "dsc",
  "set_name": "Duskmourn: House of Horror Commander",
  "set_type": "commander",
  "collector_number": "23",
  "rarity": "rare",
  "artist": "Arthur Yuan",
  "prices": {
    "usd": "0.37",
    "usd_foil": null,
    "usd_etched": null,
    "eur": "1.36",
    "eur_foil": null,
    "tix": "8.17"
  }
}