{
  "actions": [
    {
      "actions": [
        {
          "action_name": "Frightful Presence",
          "count": "1",
          "type": "ability"
        },
        {
          "action_name": "Bite",
          "count": "1",
          "type": "melee"
        },
        {
          "action_name": "Claw",
          "count": "2",
          "type": "melee"
        }
      ],
      "damage": [],
      "desc": "The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.",
      "multiattack_type": "actions",
      "name": "Multiattack"
    },
    {
      "actions": [],
      "attack_bonus": 15,
      "damage": [
        {
          "damage_dice": "2d10+8",
          "damage_type": {
            "index": "piercing",
            "name": "Piercing",
            "url": "/api/2014/damage-types/piercing"
          }
        },
        {
          "damage_dice": "2d8",
          "damage_type": {
            "index": "acid",
            "name": "Acid",
            "url": "/api/2014/damage-types/acid"
          }
        }
      ],
      "desc": "Melee Weapon Attack: +15 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) piercing damage plus 9 (2d8) acid damage.",
      "name": "Bite"
    },
    {
      "actions": [],
      "attack_bonus": 15,
      "damage": [
        {
          "damage_dice": "2d6+8",
          "damage_type": {
            "index": "slashing",
            "name": "Slashing",
            "url": "/api/2014/damage-types/slashing"
          }
        }
      ],
      "desc": "Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.",
      "name": "Claw"
    },
    {
      "actions": [],
      "attack_bonus": 15,
      "damage": [
        {
          "damage_dice": "2d8+8",
          "damage_type": {
            "index": "bludgeoning",
            "name": "Bludgeoning",
            "url": "/api/2014/damage-types/bludgeoning"
          }
        }
      ],
      "desc": "Melee Weapon Attack: +15 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.",
      "name": "Tail"
    },
    {
      "actions": [],
      "damage": [],
      "dc": {
        "dc_type": {
          "index": "wis",
          "name": "WIS",
          "url": "/api/2014/ability-scores/wis"
        },
        "dc_value": 19,
        "success_type": "none"
      },
      "desc": "Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 19 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.",
      "name": "Frightful Presence"
    },
    {
      "actions": [],
      "damage": [
        {
          "damage_dice": "15d8",
          "damage_type": {
            "index": "acid",
            "name": "Acid",
            "url": "/api/2014/damage-types/acid"
          }
        }
      ],
      "dc": {
        "dc_type": {
          "index": "dex",
          "name": "DEX",
          "url": "/api/2014/ability-scores/dex"
        },
        "dc_value": 22,
        "success_type": "half"
      },
      "desc": "The dragon exhales acid in a 90-foot line that is 10 feet wide. Each creature in that line must make a DC 22 Dexterity saving throw, taking 67 (15d8) acid damage on a failed save, or half as much damage on a successful one.",
      "name": "Acid Breath",
      "usage": {
        "dice": "1d6",
        "min_value": 5,
        "type": "recharge on roll"
      }
    }
  ],
  "alignment": "chaotic evil",
  "armor_class": [
    {
      "type": "natural",
      "value": 22
    }
  ],
  "challenge_rating": 21,
  "charisma": 19,
  "condition_immunities": [],
  "constitution": 25,
  "damage_immunities": [
    "acid"
  ],
  "damage_resistances": [],
  "damage_vulnerabilities": [],
  "dexterity": 14,
  "forms": [],
  "hit_dice": "21d20",
  "hit_points": 367,
  "hit_points_roll": "21d20+147",
  "image": "/api/images/monsters/ancient-black-dragon.png",
  "index": "ancient-black-dragon",
  "intelligence": 16,
  "languages": "Common, Draconic",
  "legendary_actions": [
    {
      "damage": [],
      "desc": "The dragon makes a Wisdom (Perception) check.",
      "name": "Detect"
    },
    {
      "damage": [],
      "desc": "The dragon makes a tail attack.",
      "name": "Tail Attack"
    },
    {
      "damage": [
        {
          "damage_dice": "2d6+8",
          "damage_type": {
            "index": "bludgeoning",
            "name": "Bludgeoning",
            "url": "/api/2014/damage-types/bludgeoning"
          }
        }
      ],
      "dc": {
        "dc_type": {
          "index": "dex",
          "name": "DEX",
          "url": "/api/2014/ability-scores/dex"
        },
        "dc_value": 23,
        "success_type": "none"
      },
      "desc": "The dragon beats its wings. Each creature within 15 ft. of the dragon must succeed on a DC 23 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.",
      "name": "Wing Attack (Costs 2 Actions)"
    }
  ],
  "name": "Ancient Black Dragon",
  "proficiencies": [
    {
      "proficiency": {
        "index": "saving-throw-dex",
        "name": "Saving Throw: DEX",
        "url": "/api/2014/proficiencies/saving-throw-dex"
      },
      "value": 9
    },
    {
      "proficiency": {
        "index": "saving-throw-con",
        "name": "Saving Throw: CON",
        "url": "/api/2014/proficiencies/saving-throw-con"
      },
      "value": 14
    },
    {
      "proficiency": {
        "index": "saving-throw-wis",
        "name": "Saving Throw: WIS",
        "url": "/api/2014/proficiencies/saving-throw-wis"
      },
      "value": 9
    },
    {
      "proficiency": {
        "index": "saving-throw-cha",
        "name": "Saving Throw: CHA",
        "url": "/api/2014/proficiencies/saving-throw-cha"
      },
      "value": 11
    },
    {
      "proficiency": {
        "index": "skill-perception",
        "name": "Skill: Perception",
        "url": "/api/2014/proficiencies/skill-perception"
      },
      "value": 16
    },
    {
      "proficiency": {
        "index": "skill-stealth",
        "name": "Skill: Stealth",
        "url": "/api/2014/proficiencies/skill-stealth"
      },
      "value": 9
    }
  ],
  "proficiency_bonus": 7,
  "reactions": [],
  "senses": {
    "blindsight": "60 ft.",
    "darkvision": "120 ft.",
    "passive_perception": 26
  },
  "size": "Gargantuan",
  "special_abilities": [
    {
      "damage": [],
      "desc": "The dragon can breathe air and water.",
      "name": "Amphibious"
    },
    {
      "damage": [],
      "desc": "If the dragon fails a saving throw, it can choose to succeed instead.",
      "name": "Legendary Resistance",
      "usage": {
        "rest_types": [],
        "times": 3,
        "type": "per day"
      }
    }
  ],
  "speed": {
    "fly": "80 ft.",
    "swim": "40 ft.",
    "walk": "40 ft."
  },
  "strength": 27,
  "type": "dragon",
  "updated_at": "2026-05-27T21:14:14.611Z",
  "url": "/api/2014/monsters/ancient-black-dragon",
  "wisdom": 15,
  "xp": 33000
}