Ancient Green Dragon

Gargantuan dragon · CR 22 · 41,000 XP

21 AC · 402 HP

Roll the Ancient Green Dragon

Rend

Poison Breath DC 22 CON

Press a roll button. The dice land here.

Stat block

Type: Gargantuan dragon, lawful evil
Armor Class: 21
Hit Points: 402 (23d20 + 161)
Speed: 40 ft., fly 80 ft., swim 40 ft.
Challenge: 22 (41,000 XP), proficiency +7
Immunities: poison
Condition immunities: Poisoned
Senses: darkvision 120 ft., blindsight 60 ft., passive perception 27
Languages: Common, Draconic

STR	DEX	CON	INT	WIS	CHA
27	12	25	20	17	22

Ancient Green Dragon odds against your Armor Class

Chance to hit, then average damage per attack once misses and critical hits are counted.

Attack	AC 12	AC 14	AC 15	AC 16	AC 18	AC 20
Rend (+15)	95% 27.1 dmg	95% 27.1 dmg	95% 27.1 dmg	95% 27.1 dmg	90% 25.7 dmg	80% 23 dmg
Full turn (3 attacks)	81.3 dmg	81.3 dmg	81.3 dmg	81.3 dmg	77.2 dmg	68.9 dmg

Ancient Green Dragon hit points

The stat block uses the average, 402. Rolled, 23d20 + 161 lands anywhere from 184 to 621.

184chance of each total for 23d20 + 161621

Hit points	Chance
293 or more	>99%
403 or more	50%
512 or more	<1%
577 or more	<1%

Traits

Amphibious. The dragon can breathe air and water.

Legendary Resistance. 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. Hit: 17 () Slashing damage plus 10 () Poison damage.

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

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 () 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.

Other CR 22 monsters

Ancient Bronze Dragon

This page includes material from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, available at dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License. The averages, odds and tables are ours.