{
  "config": {
    "features": [
      {
        "feature": {
          "config": {
            "features": [
              {
                "feature": {
                  "config": {},
                  "type": "minecraft:ice_spike"
                },
                "placement": [
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                      },
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                    "type": "minecraft:block_predicate_filter"
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                ]
              },
              {
                "feature": "arboria:spikes/ice/mid/3",
                "placement": [
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                    "predicate": {
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                      "type": "minecraft:matching_blocks"
                    },
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                ]
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        },
        "placement": [
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            "predicate": {
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              ],
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            "type": "minecraft:count"
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}