Armor Class
22
Ancient Blue Dragon
Gargantuan Dragon · Lawful Evil
Hit Points
481 (26d20 + 208)
Speed
Walk 40 ft., Burrow 40 ft., Fly 80 ft.
CR
23
Traits
Legendary Resistance (4/Day, or 5/Day in Lair)
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 (level 3 version).
Rend
Melee Attack +16, reach 15 ft. 18 () Slashing damage plus 11 () Lightning damage.
Slashing
LightningLightning Breath Recharge 5
DEX Save DC 23, each creature in a 120-foot-long, 10-foot-wide Line [Area Of Effect].
Failure: 88 () Lightning damage.
Success: Half damage.
Failure: 88 () Lightning damage.
Success: Half damage.
Legendary Actions
Cloaked Flight
The dragon uses Spellcasting to cast 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 (level 3 version). The dragon can't take this action again until the start of its next turn.
Tail Swipe
The dragon makes one Rend attack.