Young Blue Dragon

Large dragon, Lawful Evil

Armor Class18 (natural armor)
Hit Points152 (16d10 + 64)
Speed40 ft., burrow 20 ft., fly 80 ft.
STRDEXCONINTWISCHA
21 (+5) 10 (+0) 19 (+4) 14 (+2) 13 (+1) 17 (+3)
Saving ThrowsCha +7, Con +8, Dex +4, Wis +5
SkillsPerception +9, Stealth +4
Damage Vulnerabilities—
Damage Resistances—
Damage Immunitieslightning
Condition Immunities—
Sensesblindsight 30 ft., darkvision 120 ft., passive Perception 19
LanguagesCommon, Draconic
Challenge9

Actions

Multiattack.

The dragon makes three attacks: one with its bite and two with its claws.

Bite.

Melee Attack Roll: +9 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 5 (1d10) lightning damage.

Claw.

Melee Attack Roll: +9 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Lightning Breath (Recharge 5-6).

The dragon exhales lightning in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 55 (10d10) lightning damage on a failed save, or half as much damage on a successful one.