Thanks for the Carry!

Raw Blizzard Data

{
  "_links": {
    "self": {
      "href": "https://us.api.blizzard.com/data/wow/achievement/15833?namespace=static-12.1.0_68914-us"
    }
  },
  "id": 15833,
  "category": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/achievement-category/15248?namespace=static-12.1.0_68914-us"
    },
    "name": "Mounts",
    "id": 15248
  },
  "name": "Thanks for the Carry!",
  "description": "Obtain 500 mounts (usable by a single character).",
  "points": 10,
  "is_account_wide": true,
  "criteria": {
    "id": 135858,
    "description": "Obtain 500 mounts. (H)",
    "amount": 0,
    "operator": {
      "type": "AND",
      "name": "Complete All"
    },
    "child_criteria": [
      {
        "id": 135859,
        "description": "Obtain 500 mounts",
        "amount": 500,
        "show_progress_bar": true
      }
    ]
  },
  "reward_description": "Mount: Otterworldly Ottuk Carrier",
  "reward_item": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/item/198654?namespace=static-12.1.0_68914-us"
    },
    "name": "Otterworldly Ottuk Carrier",
    "id": 198654
  },
  "prerequisite_achievement": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/achievement/12934?namespace=static-12.1.0_68914-us"
    },
    "name": "A Horde of Hoofbeats",
    "id": 12934
  },
  "next_achievement": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/achievement/62096?namespace=static-12.1.0_68914-us"
    },
    "name": "Insurmountable Collection",
    "id": 62096
  },
  "media": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/media/achievement/15833?namespace=static-12.1.0_68914-us"
    },
    "id": 15833
  },
  "display_order": 29,
  "requirements": {
    "faction": {
      "type": "HORDE",
      "name": "Horde"
    }
  }
}