Ancient Blue Dragon

Gargantuan Dragon, lawful evil

AC22 (natural armor)HP481 (26d20 + 208)Speed40 ft., fly 80 ft., swim 20 ft., climb 20 ft., burrow 40 ft., crawl 20 ft.

STR

29 (+9)

DEX

10 (+0)

CON

27 (+8)

INT

18 (+4)

WIS

17 (+3)

CHA

25 (+7)

Sensesdarkvision 120 ft., blindsight 60 ft., passive Perception 27LanguagesCommon, DraconicCR23 (50,000 XP)

Traits

Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Lightning Breath. Dexterity Saving Throw: DC 23, each creature in a 120-foot-long, 10-foot-wide Line. Failure: 88 (16d10) Lightning damage. Success: Half damage.

Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Shatter (level 3 version).

Rend. Melee Attack Roll: +16, reach 15 ft. 18 (2d8 + 9) Slashing damage plus 11 (2d10) Lightning damage.

Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 22): - **At Will:** Detect Magic, Invisibility, Mage Hand, Shatter - **1/Day Each:** Scrying, Sending

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Creature data from the System Reference Document 5.2, CC-BY-4.0. See licensing.