Gargantuan dragon, neutral
- Armor Class
- 22 (natural armor)
- Hit Points
- 409 (21d20 + 189)
- Speed
- swim 60 ft., 30 ft.
- Challenge
- 24 (62,000 XP)
- Saving Throws
- Con +16, Dex +8, Wis +11
- Skills
- Perception +11
- Damage Immunities
- cold; fire
- Condition Immunities
- charmed; frightened; poisoned
- Senses
- truesight 120 ft., passive Perception 21
- Languages
- Aquan, Draconic
Traits
The dragon turtle can breathe air and water.
If the dragon turtle would be reduced to 0 hit points, its current hit point total instead resets to 350 hit points, and it recharges its Steam Breath. Additionally, the dragon turtle can now use the options in the "Mythic Actions" section for 1 hour. Award a party an additional 62,000 XP (124,000 XP total) for defeating the dragon turtle after its Blessing of the Sea activates.
If the dragon turtle fails a saving throw, it can choose to succeed instead.
The dragon turtle doesn't require food or drink.
Actions
The dragon turtle makes one Bite or Tail attack and two Claw attacks.
Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 15 (1d12 + 9) piercing damage plus 13 (2d12) lightning damage.
Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 18 (2d8 + 9) slashing damage.
Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) bludgeoning damage. If the target is a creature, it must succeed on a DC 24 Strength saving throw or be knocked prone.
The dragon turtle exhales steam in a 90-foot cone. Each creature in that area must make a DC 24 Constitution saving throw, taking 67 (15d8) fire damage on a failed save, or half as much damage on a successful one. Being underwater doesn't grant resistance against this damage.
Legendary Actions
The dragon turtle makes one Claw or Tail attack.
The dragon turtle moves up to its speed. If the dragon turtle is swimming, this movement doesn't provoke opportunity attacks.
The dragon turtle radiates intense heat. Until the start of the dragon turtle's next turn, whenever a creature starts its turn within 20 feet of the dragon turtle, that creature must succeed on a DC 24 Constitution saving throw or take 40 (9d8) fire damage. Being underwater doesn't grant resistance against this damage.
Mythic Actions
If the dragon turtle's Blessing of the Sea trait has activated in the last hour, it can use the options below as legendary actions.
The dragon turtle makes one Bite attack.
Lightning temporarily surrounds the dragon turtle, and it gains 40 temporary hit points until the start of its next turn. Until all these temporary hit points are gone, any creature that touches the dragon turtle or hits it with a melee attack takes 26 (4d12) lightning damage.