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Ancient Blue Dragon

Massive Lawful Evil desert-dwelling dragons.

Source: Systems Reference Document

Attributes

STR

29 (+9)

DEX

10 (+0)

CON

27 (+8)

INT

18 (+4)

WIS

17 (+3)

CHA

21 (+5)
StatValue
Creature TypeGargantuan Dragon
AlignmentLAWFUL_EVIL
Armor Class22 (Natural Armor)
Hit Points481 (26d20 + 208)
Combat Rating23 CR
Speed40 ft (80 ft) (40 ft)
SensesPassive Perception 27 , Darkvision 120 ft , Blindsight 60 ft
LanguagesCommon, Draconic
Damage Immunitieslightning

Skills

Proficiencies: Stealth

Expertise: Perception

  • Perception

    +17

  • Stealth

    +7

Abilities

Legendary Resistance (3/Day)

If the dragon fails a saving throw, it can choose to succeed instead.

Actions

  • Multiattack : action

    The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

  • Bite : action

    Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage plus 11 (2d10) lightning damage.

    Rolls:

    Attack: 1d20 + 16

    Piercing Damage: 2d10 + 9

    Lightning Damage: 2d10

  • Claw : action

    Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.

    Rolls:

    Attack: 1d20 + 16

    Slashing Damage: 2d6 + 9

  • Tail : action

    Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.

    Rolls:

    Attack: 1d20 + 16

    Bludgeoning Damage: 2d8 + 9

  • Frightful Presence : action

    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 (Recharge 5-6) : action

    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.

    Rolls:

    Damage: 16d10

Legendary Actions

The Ancient Blue Dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The Ancient Blue Dragon regains spent legendary actions at the start of its turn.

  • 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 feet 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.

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