{
  "id": "kubejs:copper_pendant",
  "modifiers": [
    {
      "type": "append",
      "attribute": "forge:swim_speed",
      "value": 0.3,
      "operation": "MULTIPLY_TOTAL",
      "uuid": "e33ca93d-fb20-4c05-ad7b-2a34be5d13a7"
    }
  ],
  "equipment_slot": "necklace"
}