Ancient Brass Dragon

Gargantuan dragon · CR 20 · 25,000 XP

20 AC · 332 HP

Roll the Ancient Brass Dragon

Rend

Fire Breath DC 21 DEX

Press a roll button. The dice land here.

Stat block

Type: Gargantuan dragon, chaotic good
Armor Class: 20
Hit Points: 332 (19d20 + 133)
Speed: 40 ft., burrow 40 ft., fly 80 ft.
Challenge: 20 (25,000 XP), proficiency +6
Immunities: fire
Senses: darkvision 120 ft., blindsight 60 ft., passive perception 24
Languages: Common, Draconic

STR	DEX	CON	INT	WIS	CHA
27	10	25	16	15	22

Ancient Brass 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 (+14)	95% 25.6 dmg	95% 25.6 dmg	95% 25.6 dmg	95% 25.6 dmg	85% 23 dmg	75% 20.4 dmg
Full turn (3 attacks)	76.8 dmg	76.8 dmg	76.8 dmg	76.8 dmg	69 dmg	61.2 dmg

Ancient Brass Dragon hit points

The stat block uses the average, 332. Rolled, 19d20 + 133 lands anywhere from 152 to 513.

152chance of each total for 19d20 + 133513

Hit points	Chance
242 or more	>99%
333 or more	50%
423 or more	<1%
477 or more	<1%

Traits

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 (A) Sleep Breath or (B) Spellcasting to cast Scorching Ray (level 3 version).

Rend. Melee Attack Roll: +14, reach 15 ft. Hit: 19 () Slashing damage plus 7 () Fire damage.

Fire Breath. Dexterity Saving Throw: DC 21, each creature in a 90-foot-long, 5-footwide Line. Failure: 58 () Fire damage. Success: Half damage.

Sleep Breath. Constitution Saving Throw: DC 21, each creature in a 90-foot Cone. Failure: The target has the Incapacitated condition until the end of its next turn, at which point it repeats the save. Second Failure: The target has the Unconscious condition for 10 minutes. This effect ends for the target if it takes damage or a creature within 5 feet of it takes an action to wake it.

Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 20):

Legendary actions

Blazing Light. The dragon uses Spellcasting to cast Scorching Ray (level 3 version).

Pounce. The dragon moves up to half its Speed, and it makes one Rend attack.

Scorching Sands. Dexterity Saving Throw: DC 20, one creature the dragon can see within 120 feet. Failure: 36 () Fire damage, and the target’s Speed is halved 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.

Other CR 20 monsters

Ancient White Dragon Pit Fiend

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.