Adult Blue DragonCR 16 · Huge Dragon · Stat Block & Encounter Builder

Huge dragon, Challenge 16. AC 19, 225 hit points.

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Armour Class

Hit Points

225

Speed

40 ft.

Challenge

16 · 15,000 XP

Alignment

Lawful Evil

The card

Stat Block

Huge Dragon · Lawful Evil

Adult Blue Dragon

225

18d12 + 108 · 40 ft., burrow 30 ft., fly 80 ft. · AC from natural armor

Blindsight 60 ft., Darkvision 120 ft., passive Perception 22

Languages: Common, Draconic

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

Traits

Damage ImmunitiesLightning

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

Actions

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

BiteMelee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus 5 (1d10) lightning damage.

ClawMelee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage.

TailMelee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage.

Frightful PresenceEach creature of the dragon's choice that is within 120 ft. 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 BreathThe dragon exhales lightning in a 90-foot line that is 5 ft. 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.

How to actually run it

Tactics

The stat block tells you what it can do. This tells you what to do with it.

1Multiattack: The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

2Legendary Resistance means it can auto-pass failed saves a few times a day. Expect your first control spells to be shrugged off — plan around it.

3It is a legendary creature with 3 legendary actions between turns; fight it in its lair and it is far more dangerous than the stat block alone.

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Encounter Difficulty

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How bad is this fight?

Real DMG maths — XP thresholds by level, and the group multiplier that makes crowds so much worse than the raw total suggests.

Adult Blue Dragons4Party size4Party level3

Could kill someone — and at high enough numbers, the whole party.

Difficulty

Deadly

120,000 adj. XP · ×2

deadly at 1,600

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Counsel

Adult Blue Dragon, Answered

What is Adult Blue Dragon's challenge rating in D&D 5e?

Adult Blue Dragon is Challenge 16, worth 15,000 XP. Encounter maths multiplies XP by the number of monsters, so a group is deadlier than the raw total — use the calculator on this page.

What are Adult Blue Dragon's stats?

AC 19 (natural armor), 225 hit points (18d12 + 108), speed 40 ft., burrow 30 ft., fly 80 ft.. Ability scores: STR 25, DEX 10, CON 23, INT 16, WIS 15, CHA 19.

What is Adult Blue Dragon resistant to?

Adult Blue Dragon is immune to lightning damage. Pick a damage type it does not shrug off.

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