Basic Stats
- Size/Type: Large Dragon
- Alignment: Neutral Evil
- Armor Class: 18 (natural armor)
- Hit Points: 190 (15d10 + 105)
- Speed: 40 ft., swim 60 ft., fly 80 ft.
Ability Scores
- Strength: 20 (+5)
- Dexterity: 14 (+2)
- Constitution: 24 (+7)
- Intelligence: 13 (+1)
- Wisdom: 15 (+2)
- Charisma: 16 (+3)
Saving Throws
- Dexterity: +7
- Constitution: +12
- Wisdom: +7
- Charisma: +8
Skills
- Perception: +12
- Stealth: +12
Damage Immunities
- Poison
Senses
- Darkvision 120 ft., Blindsight 30 ft., Passive Perception 22
Languages
- Common, Draconic
Challenge Rating
- 15 (13,000 XP)
Traits
- Legendary Resistance (3/Day): If the dragon fails a saving throw, it can choose to succeed instead.
- Swamp Camouflage: The dragon has advantage on Dexterity (Stealth) checks made to hide in swampy or muddy terrain.
Actions
- Multiattack: The dragon makes three attacks: one with its bite and two with its claws.
- Bite: Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 7 (2d6) poison damage.
- Claw: Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.
- Tail: Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage.
- Poison Spray Breath (Recharge 5-6): The dragon exhales a 60-foot cone of toxic mist. Each creature in that area must make a DC 18 Constitution saving throw, taking 54 (12d8) poison damage on a failed save, or half as much on a successful one, and being poisoned for 1 minute. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
- Swamp Ambush: The dragon makes a single bite attack with advantage against a creature that is surprised or in difficult terrain, dealing an extra 10 (3d6) poison damage on a hit.
Legendary Actions
The 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.
- Detect: The dragon makes a Wisdom (Perception) check.
- Tail Attack: The dragon makes a tail attack.
- Swim Surge (Costs 2 Actions): The dragon moves up to half its swimming speed without provoking opportunity attacks.
Special Abilities
- Swamp Adaptation: The dragon has advantage on Strength (Athletics) checks to swim or move through difficult swamp terrain, and it can hold its breath for up to 1 hour.
- Toxic Resilience: The dragon has resistance to acid damage and can ignore the effects of difficult terrain caused by water or mud.