[
  {
    "weight": 91,
    "reference": "the_vault:vault/rooms/nether_blackstone_common_rooms"
  },
  {
    "weight": 7,
    "reference": "the_vault:vault/rooms/challenge_rooms"
  },
  {
    "weight": 2,
    "reference": "the_vault:vault/rooms/omega_rooms"
  }
]