It's Frost Damage

Raw Blizzard Data

{
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    "self": {
      "href": "https://us.api.blizzard.com/data/wow/achievement/5369?namespace=static-12.1.0_68914-us"
    }
  },
  "id": 5369,
  "category": {
    "key": {
      "href": "https://us.api.blizzard.com/data/wow/achievement-category/15067?namespace=static-12.1.0_68914-us"
    },
    "name": "Cataclysm Dungeon",
    "id": 15067
  },
  "name": "It's Frost Damage",
  "description": "Allow three Freezing Vapors to cast Coalesce during the Admiral Ripsnarl encounter in Deadmines on Heroic Difficulty.",
  "points": 10,
  "is_account_wide": false,
  "criteria": {
    "id": 16841,
    "description": "Allow three Freezing Vapors to cast Coalesce during the Admiral Ripsnarl encounter in Deadmines on Heroic Difficulty.",
    "amount": 0
  },
  "media": {
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    },
    "id": 5369
  },
  "display_order": 41
}