Young Sea Dragon

Large dragon, Neutral Evil

Armor Class

18 (natural armor)

Hit Points

152 (16d10+64)

Speed

walk 40 ft., fly 80 ft., swim 50 ft.

Saves

Dex +4, Con +8, Wis +5, Cha +7

Skills

Perception +9, Stealth +4

Damage Immunities

cold

Senses

blindsight 30 ft. darkvision 120 ft.

Languages

Common, Draconic

Challenge

9

Amphibious

The dragon can breathe air and water.

Siege Monster

The dragon deals double damage to objects

and structures

Actions

Multiattack

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

Bite

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

Claw

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

Tidal Breath (Recharge 5-6)

The dragon exhales a crushing wave of frigid seawater in a 30-foot cone. Each creature in that area must make a DC 16 Dexterity saving throw. On a failure, the target takes 27 (5d10) bludgeoning damage and 27 (5d10) cold damage, and is pushed 30 feet away from the dragon and knocked prone. On a successful save the creature takes half as much damage and isn't pushed or knocked prone.