{
  "feature": "svm_ep:cave/blackstone_blob",
  "placement": [
    {
      "type": "minecraft:count_on_every_layer",
      "count": {
        "type": "minecraft:uniform",
          "min_inclusive": 5,
          "max_inclusive": 21
      }
    },
    {
      "type": "minecraft:random_offset",
      "xz_spread": 0,
      "y_spread": -2
    }
  ]
}