Adult Blue Dragon
Huge dragon · CR 16 · 15,000 XP
19 AC · 212 HP
Roll the Adult Blue Dragon
Press a roll button. The dice land here.
Stat block
- Type
- Huge dragon, lawful evil
- Armor Class
- 19
- Hit Points
- 212 (17d12 + 102)
- Speed
- 40 ft., burrow 30 ft., fly 80 ft.
- Challenge
- 16 (15,000 XP), proficiency +5
- Immunities
- lightning
- Senses
- darkvision 120 ft., blindsight 60 ft., passive perception 22
- Languages
- Common, Draconic
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 25 | 10 | 23 | 16 | 15 | 20 |
Adult Blue Dragon odds against your Armor Class
Chance to hit, then average damage per attack once misses and critical hits are counted.
| Attack | AC 12 | AC 14 | AC 15 | AC 16 | AC 18 | AC 20 |
|---|---|---|---|---|---|---|
| Rend (+12) | 95% 21.2 dmg | 95% 21.2 dmg | 90% 20.1 dmg | 85% 19 dmg | 75% 16.8 dmg | 65% 14.7 dmg |
| Full turn (3 attacks) | 63.5 dmg | 63.5 dmg | 60.2 dmg | 57 dmg | 50.6 dmg | 44.1 dmg |
Adult Blue Dragon hit points
The stat block uses the average, 212. Rolled, 17d12 + 102 lands anywhere from 119 to 306.
| Hit points | Chance |
|---|---|
| 166 or more | >99% |
| 213 or more | 50% |
| 259 or more | <1% |
| 287 or more | <1% |
Traits
Legendary Resistance. If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Shatter.
Rend. Melee Attack Roll: +12, reach 10 ft. Hit: 16 () Slashing damage plus 5 () Lightning damage.
Lightning Breath. Dexterity Saving Throw: DC 19, each creature in a 90-foot-long, 5-footwide Line. Failure: 60 () Lightning damage. Success: Half damage.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 18):
Legendary actions
Cloaked Flight. The dragon uses Spellcasting to cast Invisibility on itself, and it can fly up to half its Fly Speed. The dragon can’t take this action again until the start of its next turn.
Sonic Boom. The dragon uses Spellcasting to cast Shatter. The dragon can’t take this action again until the start of its next turn.
Tail Swipe. The dragon makes one Rend attack.
Other CR 16 monsters
Adult Silver Dragon
Iron Golem
Marilith
PlanetarThis page includes material from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, available at dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License. The averages, odds and tables are ours.