Ancient White Dragon

Gargantuan dragon · CR 20 · 25,000 XP

20 AC · 333 HP

Roll the Ancient White Dragon

Rend

Cold Breath DC 22 CON

Press a roll button. The dice land here.

Stat block

Type: Gargantuan dragon, chaotic evil
Armor Class: 20
Hit Points: 333 (18d20 + 144)
Speed: 40 ft., burrow 40 ft., fly 80 ft., swim 40 ft.
Challenge: 20 (25,000 XP), proficiency +6
Immunities: cold
Senses: darkvision 120 ft., blindsight 60 ft., passive perception 23
Languages: Common, Draconic

STR	DEX	CON	INT	WIS	CHA
26	10	26	10	13	18

Ancient White 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% 23.6 dmg	95% 23.6 dmg	95% 23.6 dmg	95% 23.6 dmg	85% 21.2 dmg	75% 18.8 dmg
Full turn (3 attacks)	70.8 dmg	70.8 dmg	70.8 dmg	70.8 dmg	63.6 dmg	56.4 dmg

Ancient White Dragon hit points

The stat block uses the average, 333. Rolled, 18d20 + 144 lands anywhere from 162 to 504.

162chance of each total for 18d20 + 144504

Hit points	Chance
248 or more	>99%
333 or more	51%
419 or more	<1%
470 or more	<1%

Roll 18d20 + 144 on its own with the d20 roller, or weigh it up on the dice calculator.

Traits

Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, Difficult Terrain composed of ice or snow doesn’t cost it extra movement.

Legendary Resistance. If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The dragon makes three Rend attacks.

Rend. Melee Attack Roll: +14, reach 15 ft. Hit: 17 () Slashing damage plus 7 () Cold damage.

Cold Breath. Constitution Saving Throw: DC 22, each creature in a 90-foot Cone. Failure: 63 () Cold damage. Success: Half damage.

Legendary actions

Freezing Burst. Constitution Saving Throw: DC 20, each creature in a 30-foot-radius Sphere centered on a point the dragon can see within 120 feet. Failure: 14 () Cold damage, and the target’s Speed is 0 until the end of the target’s next turn. Failure or Success: The dragon can’t take this action again until the start of its next turn.

Frightful Presence. The dragon casts Fear, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 18). 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 20 monsters

Ancient Brass 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.