Adult Green Dragon
Huge Dragon, Lawful Evil
AC 19
HP 207 ()
Speed 40 ft., Fly 80 ft., Swim 40 ft.
Saving Throws DEX , WIS
Skills Deception , Perception , Persuasion , Stealth
Immunities Poison, Poisoned
Senses Darkvision 120 ft., Blindsight 60 ft., Passive Perception 22
Languages Common, Draconic
CR 15 (XP 13,000; 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):
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 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.