{
  "weight": 3,
  "reforge_experience_cost": 4,
  "reforge_durability_cost": 2,
  "reforge_item": "tiered:toolsmiths_hammer",
  "style": {
    "color": "green"
  },
  "attributes": [
    {
      "type": "player.block_break_speed",
      "modifier": {
        "id": "hasteful",
        "operation": "ADD_MULTIPLIED_TOTAL",
        "amount": 0.20
      },
      "optional_equipment_slots": [
        "MAINHAND"
      ]
    }
  ]
}