Adult Sea Dragon
Huge Dragon, neutral evil (CR 16)Armor Class 19 natural armor
Hit Points 225 (18d12+108)
Speed 40 ft., swim 60 ft., fly 80 ft.
25 (+7)
10 (+0)
23 (+6)
17 (+3)
15 (+2)
19 (+4)
Skills perception 12, stealth 5
Senses blindsight 60ft, darkvision 120ft, passive Perception 22
Languages Common, Draconic
Challenge Rating 16
Actions
Multiattack.
The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Bite.
Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus 5 (1d10) cold damage.
Claw.
Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage.
Tail.
Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage.
Frightful Presence.
Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 17 Wisdom saving throw or become frightened for 1 minute. A creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.
Tidal Breath (Recharge 5-6).
The dragon exhales a crushing wave of frigid seawater in a 60-foot cone. Each creature in that area must make a DC 19 Dexterity saving throw. On a failure, the target takes 33 (6d10) bludgeoning damage and 33 (6d10) 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.
sizeHuge
typeDragon
group
alignmentneutral evil
strength_save
dexterity_save5
constitution_save11
intelligence_save
wisdom_save7
charisma_save9
perception12
damage_vulnerabilities
damage_resistances
damage_immunitiescold
condition_immunities
cr16
reactions
legendary_descThe dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.
legendary_actionsname: Detect,desc: The dragon makes a Wisdom (Perception) check.,name: Tail Attack,desc: The dragon makes a tail attack.,name: Wing Attack (Costs 2 Actions),desc: The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 20 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage and be knocked prone. The dragon can then move up to half its flying speed, or half its swim speed if in the water.
special_abilitiesname: Amphibious,desc: The dragon can breathe air and water.,name: Legendary Resistance (3/Day),desc: If the dragon fails a saving throw, it can choose to succeed instead.,name: Siege Monster,desc: The dragon deals double damage to objects and structures.
spell_list
page_no135
document__license_urlhttp://open5e.com/legal
document__slugtob
document__titleTome of Beasts
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Tome of Beasts, page no. 135