SRD5:Adult Blue Dragon

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Blue Dragon exists in other D&D editions see:

Blue Dragon (disambiguation).

This material from the 5th edition SRD is published under the OGL and CC-BY
Adult Blue Dragon [SRD5 OGL/CC-BY][1] [2] [3]
Huge Dragon (Chromatic Dragons, Blue Dragons), Lawful Evil
Armor Class: 19 (natural armor)
Hit Points: 225 (18d12+108)
Speed: 40 ft., burrow 30 ft., fly 80 ft.
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
Damage Immunity: lightning
Senses: blindsight 60 ft., darkvision 120 ft., passive Perception 22
Languages: Common, Draconic
Habitat: Coastal, Desert
Challenge: 16 (15,000 xp)Proficiency Bonus (PB): +5


Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead. 


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 15 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.

End of the SRD5 material

Unofficial Description: Blue Dragon over 100 years old.

Variant: Dragons as Innate Spellcasters[edit]

[4] Many dragons have the ability to innately cast spells. Their Spellcasting Ability is Charisma, which also determines the number of spells it can cast.

Blue Dragon's Lair

[6] Blue dragons dig their lairs of "crystalized caverns and tunnels"[5] in isolated, barren lands.

Lair Actions

[6] When fighting inside its lair, an blue dragon can use lair actions. On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row:

  • Ceiling Collapses
  • Cloud of Sand
  • Lightning Arcs
  • Thunderstorms
  • Dust Devils
  • Hidden Sinkholes

If the dragon dies, the effects fade over 1d10 days.

Sources and Notes[edit]

  1. Wizards RPG Team (6 May 2015). SRD-OGL v5.1. (5e) Wizards of the Coast. Licensed: OGL & CC-BY.
  2. Note: Habitat is not part of the SRD5.
  3. habitat - Dungeon Master's Guide (5e) p.302-305
  4. Wizards RPG Team (September 2014). Monster Manual. (5e) Wizards of the Coast. ISBN 978-0786965618. p. 86. (paraphrased) Licensed:© Wizards of the Coast (used under 'fair use' clause).
  5. MM5 p.89.
  6. Wizards RPG Team (September 2014). Monster Manual. (5e) Wizards of the Coast. ISBN 978-0786965618. p. 89. (summarized)

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Facts about "Adult Blue Dragon"
AlignmentLawful Evil +
AuthorSRD5 +
CRval16 +
Canontrue +
Challenge Rating16 +
Creature NameAdult Blue Dragon +
Experience Points15,000 +
FeaturesLegendary Resistance +, Multiattack +, Bite +, Claw +, Tail +, Frightful Presence +, Lightning Breath +, Detect +, Tail Attack + and Wing Attack +
HabitatCoastal + and Desert +
Has Lairtrue +
Hit Dice18d12+108 +
Hit Points225 +
Legendary Monstertrue +
MaturityAdult +
NameAdult Blue Dragon +
PublicationSRD5 +
SizeHuge +
SortTextDragon Blue Adult +
SubtypeChromatic Dragon + and Blue Dragon +
SummaryBlue Dragon over 100 years old +
TypeDragon +