rsemcm/client/overrides/config/alexsmobs/tusklin_spawns.json

{
  "biomes": [
    [
      {
        "type": "REGISTRY_NAME",
        "negate": false,
        "value": "minecraft:ice_spikes"
      }
    ],
    [
      {
        "type": "BIOME_DICT",
        "negate": false,
        "value": "overworld"
      },
      {
        "type": "BIOME_DICT",
        "negate": false,
        "value": "snowy"
      },
      {
        "type": "BIOME_DICT",
        "negate": true,
        "value": "forest"
      },
      {
        "type": "BIOME_DICT",
        "negate": true,
        "value": "mountain"
      }
    ]
  ]
}