{
    "anvil_cost": 1,
    "description": "Defender",
    "effects": {
      "minecraft:attributes": [
        {
          "attribute": "minecraft:armor",
          "id": "defender_armor_attribute",
          "amount": {
            "type": "minecraft:linear",
            "base": 0.5,
            "per_level_above_first": 0.5
          },
          "operation": "add_value"
        }
      ]
    },
    "max_cost": {
      "base": 50,
      "per_level_above_first": 10
    },
    "max_level": 5,
    "min_cost": {
      "base": 7,
      "per_level_above_first": 7
    },
    "slots": [
      "mainhand",
      "offhand"
    ],
    "supported_items": "minecraft:shield",
    "weight": 3
  }