Ancient Blue Dragon 5e Stat Block: AC, HP, CR, and Actions

Armor Class

22 (natural)

Hit Points

481

(26d20+208)

Speed:

Walk 40 ft.,

Burrow 40 ft.,

Fly 80 ft.,

STR 29 (+9)

DEX 10 (+0)

CON 27 (+8)

INT 18 (+4)

WIS 17 (+3)

CHA 21 (+5)

Saving Throws:

DEX +7

CON +15

WIS +10

CHA +12

Skills:

Perception +17

Stealth +7

Damage Vulnerabilities: —

Damage Resistances: —

Damage Immunities: lightning

Condition Immunities: —

Senses:

blindsight 60 ft., darkvision 120 ft.

Passive Perception:

Languages: Common, Draconic

CR:

(50000 XP)

Proficiency Bonus: 7

Traits:

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

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:

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 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.

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