Ancient Black Dragon

Size: Gargantuan Type: dragon Alignment: chaotic evil Armor Class: ["type": "natural", "value": 22] Hit Points: 367 Hit Dice: 21d20 Speed: "fly": "80 ft.", "swim": "40 ft.", "walk": "40 ft." Challenge Rating: 21 Xp: 33000 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"}] 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"}] 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)"}] Charisma: 19 Constitution: 25 Damage Immunities: acid Dexterity: 14 Hit Points Roll: 21d20+147 Intelligence: 16 Languages: Common, Draconic 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 Senses: "blindsight": "60 ft.", "darkvision": "120 ft.", "passive_perception": 26 Strength: 27 Wisdom: 15