- Armor Class 19 (natural armor)
- Hit Points 207 ()
- Speed 40 ft., fly 80 ft., swim 40 ft.
- Initiative +11 (21)
- Saving Throws ,
- Skills , , ,
- Immunities poison, poisoned
- Senses Blindsight 60 ft., Darkvision 120 ft., Passive Perception 22
- Languages Common, Draconic
- Challenge 15 (13,000 XP; PB +5)
Traits
Amphibious. The dragon can breathe air and water.
Legendary Resistance (3/Day, or 4/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Mind Spike (level 3 version).
Rend. Melee Attack Roll: , reach 10 ft. Hit: 15 () Slashing damage plus 7 () Poison damage.
Poison Breath (Recharge 5–6). Constitution Saving Throw: DC 18, each creature in a 60-foot Cone. Failure: 56 () Poison damage. Success: Half damage.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 17): – At Will: Detect Magic, Mind Spike – 1/Day Each: Geas
Legendary Actions
Mind Invasion. The dragon uses Spellcasting to cast Mind Spike (level 3 version).
Noxious Miasma. Constitution Saving Throw: DC 17, each creature in a 20-foot-radius Sphere [Area of Effect]|XPHB|Sphere centered on a point the dragon can see within 90 feet. Failure: 7 () Poison damage, and the target takes a -2 penalty to AC until the end of its next turn. Failure or Success: The dragon can’t take this action again until the start of its next turn.
Pounce. The dragon moves up to half its Speed, and it makes one Rend attack.