{
    "primary_items": "#minecraft:enchantable/armor",
    "anvil_cost": 4,
    "description": "Boost",
    "effects": {
      "minecraft:location_changed": [
        {
          "effect": {
            "type": "minecraft:attribute",
            "attribute": "minecraft:jump_strength",
            "id": "boost_jump_strength",
            "amount": {
              "type": "minecraft:linear",
              "base": 0.1,
              "per_level_above_first": 0.1
            },
            "operation": "add_value"
          }
        }
      ]
    },
    "max_cost": {
      "base": 50,
      "per_level_above_first": 0
    },
    "max_level": 3,
    "min_cost": {
      "base": 20,
      "per_level_above_first": 0
    },
    "slots": [
      "armor"
    ],
    "supported_items": "#minecraft:enchantable/armor",
    "weight": 2
  }