5e Cards
Challenge 20: 20

Ancient White Dragon

Gargantuan dragon, chaotic evil

Armor Class
20 (natural armor)
Hit Points
333 (18d20+144)
Speed
40 ft., burrow 40 ft., fly 80 ft., swim 40 ft.
STR
26 (+8)
DEX
10 (+0)
CON
26 (+8)
INT
10 (+0)
WIS
13 (+1)
CHA
14 (+2)
Saving Throws
Dex +6, Con +14, Wis +7, Cha +8
Skills
Perception +13, Stealth +6
Damage Immunities
cold
Senses
blindsight 60 ft., darkvision 120 ft., passive Perception 23
Languages
Common, Draconic
Challenge
20 (25,000 XP)
Proficiency Bonus
+6

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 (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) piercing damage plus 9 (2d8) cold damage.

Claw. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.

Tail. Melee Weapon Attack: +14 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 16 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Cold Breath (Recharge 5-6). The dragon exhales an icy blast in a 90-foot cone. Each creature in that area must make a DC 22 Constitution saving throw, taking 72 (16d8) cold damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.

Detect. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 ft. of the dragon must succeed on a DC 22 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

How many for your party

Copies of the ancient white dragon (25,000 XP each) against a party of four characters of the same level. Build mixed fights in the encounter builder.

Number of Ancient White Dragon for each difficulty, party of four
Party levelEasyMediumHardDeadly
Level 15——12–20
Level 16——12–20
Level 17——12–20
Level 18—1—2–20
Level 19—1—2–20
Level 20—1—2–20

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Questions

What CR is the Ancient White Dragon?

The Ancient White Dragon is challenge 20, worth 25,000 XP, with a proficiency bonus of +6.

How many hit points does the Ancient White Dragon have?

333 hit points (18d20+144), with AC 20 from natural armor.

How many should I use against four 15th-level characters?

Against four level 15 characters, 1 is hard by the encounter XP budget.