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Ancient Blue Dragon

Monster Image

Basic

Size: Gargantuan

Type: dragon

Alignment: lawful evil

Health

Hit Points: 481

Hit Dice: 26d20

HP Roll: 26d20+208

Armor

Type: natural

Value: 22

Movement

Walk: 40 ft.

Fly: 80 ft.

Swim: None

Ability Scores

Strength: 29

Dexterity: 10

Constitution: 27

Intelligence: 18

Wisdom: 17

Charisma: 21

Proficiencies

  • Saving Throw: DEX: +7
  • Saving Throw: CON: +15
  • Saving Throw: WIS: +10
  • Saving Throw: CHA: +12
  • Skill: Perception: +17
  • Skill: Stealth: +7

Senses

  • blindsight: 60 ft.
  • darkvision: 120 ft.
  • passive_perception: 27

Damage Vulnerabilities

None

Damage Resistances

None

Damage Immunities

  • lightning

Condition Immunities

None

Special Abilities

  • Legendary Resistance: If the dragon fails a saving throw, it can choose to succeed instead.
    • Usage Type: per day
    • Count: 3
    • Rest Types: None

Actions

  • Multiattack: The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
  • Bite: Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage plus 11 (2d10) lightning damage.
  • Claw: Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.
  • Tail: Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.
  • Frightful Presence: Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 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.
  • Lightning Breath: The dragon exhales lightning in a 120-foot line that is 10 feet wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16d10) lightning damage on a failed save, or half as much damage on a successful one.

Legendary Actions

  • Detect: The dragon makes a Wisdom (Perception) check.
  • Tail Attack: The dragon makes a tail attack.
  • Wing Attack (Costs 2 Actions): The dragon beats its wings. Each creature within 15 ft. of the dragon must succeed on a DC 24 Dexterity saving throw or take 16 (2d6 + 9) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Other Information

Languages: Common, Draconic

Challenge Rating: 23

Proficiency Bonus: 7

XP: 50000