tlaternet-server/configuration/services/configs/minecraft/voor-kia/config/iceandfire/hippogryph_chestnut_biomes.json

{
  "biomes": [
    [
      {
        "type": "BIOME_DICT",
        "negate": false,
        "value": "overworld"
      },
      {
        "type": "REGISTRY_NAME",
        "negate": false,
        "value": "minecraft:wooded_mountains"
      }
    ]
  ]
}