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Ancient Black Dragon

Massive Chaotic Evil swamp-dwelling dragons.

Source: Systems Reference Document

Attributes

STR

27 (+8)

DEX

14 (+2)

CON

25 (+7)

INT

16 (+3)

WIS

15 (+2)

CHA

19 (+4)
StatValue
Creature TypeGargantuan Dragon
AlignmentCHAOTIC_EVIL
Armor Class22 (Natural Armor)
Hit Points367 (21d20 + 147)
Combat Rating21 CR
Speed40 ft (80 ft) (40 ft)
SensesPassive Perception 26 , Darkvision 120 ft , Blindsight 60 ft
LanguagesCommon, Draconic
Damage Immunitiesacid

Skills

Proficiencies: Stealth

Expertise: Perception

  • Perception

    +16

  • Stealth

    +9

Abilities

Amphibious

The dragon can breathe air and water.

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: +15 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) piercing damage plus 9 (2d8) acid damage.

    Rolls:

    Attack: 1d20 + 15

    Piercing Damage: 2d10 + 8

    Acid Damage: 2d8

  • Claw : action

    Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.

    Rolls:

    Attack: 1d20 + 15

    Slashing Damage: 2d6 + 8

  • Tail : action

    Melee Weapon Attack: +15 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.

    Rolls:

    Attack: 1d20 + 15

    Bludgeoning Damage: 2d8 + 8

  • 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 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.

  • Acid Breath (Recharge 5-6) : action

    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.

    Rolls:

    Damage: 15d8

Legendary Actions

The Ancient Black 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 Black 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 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

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