Young Sea Dragon
Large Dragon, Neutral Evil
Armor Class 18 (natural armor)
Hit Points 190 (20d10 + 80)
Speed fly +40, walk +50
Challenge 9
Saving Throws cha +7, con +8, dex +4, wis +5
Skills Stealth +4, Perception +9
Damage Vulnerabilities False
Damage Resistances False
Damage Immunities cold
Condition Immunities False
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 19
Languages Common, Draconic, Primordial
Special Abilities
Amphibious. The dragon can breathe air and water.
Siege Monster. The dragon deals double damage to objects and structures.
Actions
Multiattack. The dragon makes one Bite attack and two Fin attacks.
Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 7 (2d6) cold damage.
Fin. 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 creature takes 22 (4d10) bludgeoning damage and 22 (4d10) cold damage and is pushed up to 15 feet away from the dragon and knocked prone. On a success, the creature takes half the damage and isn't pushed or knocked prone.
Source: Tome of Beasts 2023 · OGL/Open