Ancient Green Dragon

Gargantuan Dragon (Chromatic), Lawful Evil

Armor Class: 21
Hit Points: 402 (23d20 + 161)
Speed: 40 ft., Fly 80 ft., Swim 40 ft.
Initiative: +5 (15)

STAT	SCORE	MOD	SAVE
STR	27	+8	+8
DEX	12	+1	+8
CON	25	+7	+7
INT	20	+5	+5
WIS	17	+3	+10
CHA	22	+6	+6

Immunities: Poison; Poisoned
Skills: Deception +13, Perception +17, Persuasion +13, Stealth +8
Senses: blindsight 60 ft., darkvision 120 ft.; Passive Perception 27
Languages: Common, Draconic
CR 22 (XP 41,000, or 50,000 in lair)

Traits

Amphibious. The dragon can breathe air and water.

Legendary Resistance (4/Day, or 5/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 5 version).

Rend. Melee Attack Roll: +15, reach 15 ft. 17 (2d8 + 8) Slashing damage plus 10 (3d6) Poison damage.

Poison Breath (Recharge 5-6). Constitution Saving Throw: DC 22, each creature in a 90-foot Cone. Failure: 77 (22d6) 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 21):

At Will: Detect Magic, Mind Spike
1e/Day Each: Geas, Modify Memory

Legendary Actions

Mind Invasion. The dragon uses Spellcasting to cast Mind Spike (level 5 version).

Noxious Miasma. Constitution Saving Throw: DC 21, each creature in a 30-foot-radius Sphere centered on a point the dragon can see within 90 feet. Failure: 17 (5d6) 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.

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