> [Monsters, NPC and Animals](srd_monsters.md)

---

# Adult Blue Dragon

- Alias: [Dragon bleu adulte](hd_monsters_dragon_bleu_adulte.md)
-  Huge dragon, lawful evil
- **Armor Class** 19 (natural armor)
- **Hit Points** 225 (18d12 + 108)
- **Speed** 40 ft., burrow 30 ft., fly 80 ft.

|STR|DEX|CON|INT|WIS|CHA|
|---|---|---|---|---|---|
|25 (+7)|10 (+0)|23 (+6)|16 (+3)|15 (+2)|19 (+4)|

- **Saving Throws** Dex +5, Con +11, Wis +7, Cha +9
- **Skills** Perception +12, Stealth +5
- **Senses** blindsight 60 ft., darkvision 120 ft., passive Perception 22
- **Languages** Common, Draconic
- **Challenge** 16 (15000 XP)
- **Damage Immunities** lightning

## Special Features

**_Legendary Resistance (3/Day)_**. 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: +12 to hit, reach 10 ft., one target.

_Hit_: 18 (2d10 + 7) piercing damage plus 5 (1d10) lightning damage.

**_Claw_**. Melee Weapon Attack: +12 to hit, reach 5 ft., one target.

_Hit_: 14 (2d6 + 7) slashing damage.

**_Tail_**. Melee Weapon Attack: +12 to hit, reach 15 ft., one target.

_Hit_: 16 (2d8 + 7) 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 17 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)_**. The dragon exhales lightning in a 90-foot line that is 5 feet wide. Each creature in that line must make a DC 19 Dexterity saving throw, taking 66 (12d10) lightning damage on a failed save, or half as much damage on a successful one.

## Legendary Actions

The 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 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 10 feet of the dragon must succeed on a DC 20 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

