{
  "feature": "phantasm:obsidian_tower",
  "placement": [
    {
      "type": "minecraft:heightmap",
      "heightmap": "MOTION_BLOCKING"
    },
    {
      "type": "minecraft:rarity_filter",
      "chance": 512
    },
    {
      "type": "minecraft:random_offset",
      "xz_spread": {
        "type": "minecraft:uniform",
        "value": {
          "min_inclusive": -16,
          "max_inclusive": 16
        }
      },
      "y_spread": 0
    }
  ]
}
