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.
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.
Blue dragons make their lairs in barren places, using their lightning breath and their burrowing ability to carve out crystallized caverns and tunnels beneath the sands.
Thunderstorms rage around a legendary blue dragon’s lair, and narrow tubes lined with glassy sand ventilate the lair, all the while avoiding the deadly sinkholes that are the dragon’s first line of defense.
A blue dragon will collapse the caverns that make up its lair if that lair is invaded. The dragon then burrows out, leaving its attackers to be crushed and suffocated. When it returns later, it collects its possessions — along with the wealth of the dead intruders.
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:
- Part of the ceiling collapses above one creature that the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Dexterity saving throw or take 10 (3d6) bludgeoning damage and be knocked prone and buried. The buried target is restrained and unable to breathe or stand up. A creature can take an action to make a DC 10 Strength check, ending the buried state on a success.
- A cloud of sand swirls about in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The cloud spreads around corners. Each creature in the cloud must succeed on a DC 15 Constitution saving throw or be blinded 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.
- Lightning arcs, forming a 5-foot-wide line between two of the lair’s solid surfaces that the dragon can see. They must be within 120 feet of the dragon and 120 feet of each other. Each creature in that line must succeed on a DC 15 Dexterity saving throw or take 10 (3d6) lightning damage.
Regional Effects
The region containing a legendary blue dragon’s lair is warped by the dragon’s magic, which creates one or more of the following effects:
- Thunderstorms rage within 6 miles of the lair.
- Dust devils scour the land within 6 miles of the lair. A dust devil has the statistics of an air elemental, but it can’t fly, has a speed of 50 feet, and has an Intelligence and Charisma of 1 (−5).
- Hidden sinkholes form in and around the dragon’s lair. A sinkhole can be spotted from a safe distance with a successful DC 20 Wisdom (Perception) check. Otherwise, the first creature to step on the thin crust covering the sinkhole must succeed on a DC 15 Dexterity saving throw or fall 1d6× 10 feet into the sinkhole.
If the dragon dies, the dust devils disappear immediately, and the thunderstorms abate within 1d10 days. Any sinkholes remain where they are.
I am so going to use this in my adventure, which is going to take place in the Kingdom of Litore, a costal kingdom with many beaches and port towns and cities.
I thought dragons were supposed to be able to change into a humanoid form. Why isn't that mentioned in any of the entries on here?
Only Metallic dragon can do that thing
Few dragons have an inborn shapechange ability, however dragons with spell casting have the ability to use the polymorph spell to obtain a human form
only good dragons
I am so going to use this in my campaign called destruction rising someone please play it
I'm thinking of using a dragon as a character, but i dont want them to be good. I cant find shape-changing here though?... Nor the dragons normal personality characteristics? example: how is this one "lawful evil"?
Only metallic dragons can shapechange. You could give the dragon spellcasting abilities, and they could cast a spell to shapeshift.
Dragon personality characteristics are in the Monster Manual.
Your campaign, do what you want.
I'm so thankful this is here otherwise id have no idea what it was and my campaign (horde of the dragon queen) would be completely ruined its my first campaign so want to make a good impression for my son he is a pro
I thought just white dragons were in HotDQ?
I wanted to tame this kind of dragon.
Ancient dragons usually can, espiecally metallic dragons, you could also give dragons their own sepll lists and give them class levels.
Wow hwo do I get him/her.
I Love You Sébastien
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I've always found it so strange that yellow dragons don't take the place of blue dragons in common use, I always imagined a blue dragon as cold (Although white dragon has that title) and a yellow dragon as a better color for a lightning dragon. This information... shocked me when I first saw it
No, in the first chapter there is a blue dragon which attacks Greenest
Oh yeah, right. I also think there was 2 black dragons near castle naerytar.
I highly recommend home-brewing it. I've told my players that any meta-knowledge they have of monsters, etc., is rumour and that they should expect the unexpected. They are a very experienced group with most players having over 35 years DnD experience, so I do a lot of reskinning and tweaking to keep things fresh and keep them guessing. One character has found a book in game on dragons with lots of academic studies on them which is full of conflicting information, and scholarly disputes (the message being: I am giving them a list of possible draconic characteristics and abilities, but nothing is certain). It's a lot more fun that way. PS: I leave it up to them to decide if they're outmatched (just like real life!)