Hero Talents & Abilities

Talent? Hah. That seems generous.

--Raven Lord

Example:

{
  "id": "68",
  "shortName": "malthael",
  "attributeId": "MALT",
  "name": "Malthael",
  "icon": "malthael.png",
  "role": "Assassin",
  "type": "Melee",
  "releaseDate": "2017-06-13",
  "abilities": {
    "Malthael": [
      {
        "name": "Soul Rip",
        "description": "Extract the souls of nearby enemies afflicted by Reaper's Mark, dealing 100 (+4% per level) damage and healing Malthael for 44 per target hit. Heroic targets heal Malthael for an additional 3% of the Hero's maximum Health.",
        "hotkey": "Q",
        "abilityId": "Malthael|Q1",
        "cooldown": 2,
        "manaCost": "20"
      },
      ...
      {
        "name": "Tormented Souls",
        "description": "Gain 10 Armor and unleash a torrent of souls, continually applying Reaper's Mark to nearby enemies for 4 seconds.",
        "hotkey": "R",
        "abilityId": "Malthael|R1",
        "cooldown": 100,
        "manaCost": "100"
      },
      ...
      {
        "name": "Reaper's Mark",
        "description": "Basic Attacks afflict non-Structure targets with Reaper's Mark for 4 seconds.  Marked enemies are revealed and take damage equal to 2.25% of their maximum Health every 1 second.",
        "trait": true,
        "abilityId": "Malthael|D1"
      }
    ]
  },
  "talents": {
    "1": [
      {
        "tooltipId": "MalthaelDeathsReach",
        "talentTreeId": "MalthaelDeathsReach",
        "name": "Death's Reach",
        "description": "Increase Wraith Strike's range by 35%.",
        "icon": "storm_ui_icon_malthael_wraithstrike.png",
        "sort": 1,
        "abilityId": "Malthael|W1"
      },
      {
        "tooltipId": "MalthaelOnAPaleHorse",
        "talentTreeId": "MalthaelOnAPaleHorse",
        "name": "On a Pale Horse",
        "description": "Gain an additional 20% Movement Speed while mounted.",
        "icon": "storm_ui_icon_malthael_onpalehorse.png",
        "sort": 2,
        "abilityId": "Malthael|Passive"
      },
      {
        "tooltipId": "MalthaelFearTheReaper",
        "talentTreeId": "MalthaelFearTheReaper",
        "name": "Fear the Reaper",
        "description": "Activate to increase Movement Speed by 25% and pass through other units for 4 seconds.",
        "icon": "storm_ui_icon_malthael_fearthereaper.png",
        "sort": 3,
        "abilityId": "Malthael|Active",
        "cooldown": 25
      }
    ],
    "4": [
    ...
    ]
    ...
}

Notes on key/value pairs

shortName is the hero's name with periods, dashes, apostrophes, spaces, and capitalization removed; it is currently used as the name of a hero's JSON file and image
manaCost is a string due to several Heroes (Azmodan, Arthas, etc.) having channeled abilities with per-second mana costs
abilityId can be used to link a talent to its related ability.
- Talents that create a new ability will have abilityId of HeroName|Active. Ex: Fear the Reaper (seen above), Bolt of the Storm
- Talents granting changes to Basic Attacks or other passive effects will have abilityId of HeroName|Passive. Ex: On a Pale Horse (above), Burning Rage, Executioner
talentTreeId is the name of the talent as used in replay files
sort indicates the order of talents on that level/tier
icon is the image name for the talent from game files

Resources

Several values are pulled directly from game files using an altered version of heroesinfo from HotsData
Most damage and scaling numbers are from dizzyMongoose's Scaling Stats Google sheet