Dexterity +6, Wisdom +7
Perception +13, Stealth +6
+12
Blindsight 60 ft, Darkvision 120 ft
Common, Draconic
Cold
Traits
Ice Walk
The ancient white 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
4/day (5/day in lair). If the ancient white dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack
The ancient white dragon makes three Rend attacks.
Rend
Melee Weapon Attack: +14 to hit, reach 15 ft.. Hit: 17 (2d8 + 8) slashing plus 7 (2d6) cold damage.
Cold Breath
Recharge 5–6. Constitution Saving Throw: DC 22, each creature in a 90-foot Cone.
Failure: 63 (14d8) cold damage.
Success: Half damage.
Legendary Actions
3 legendary actions (4 in its lair). Only one legendary action can be used at a time and only at the end of another creature's turn. This creature regains spent legendary actions at the start of its turn.
Freezing Burst
Constitution Saving Throw: DC 22, each creature in a 30-foot-radius Sphere centered on a point the ancient white dragon can see within 120 feet.
Failure: 14 (4d6) cold damage, and the target's Speed is 0 until the end of the target's next turn.
Failure or Success: The ancient white dragon can't take this action again until the start of its next turn.
Frightful Presence
The ancient white dragon casts Fear, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 18). The ancient white dragon can't take this action again until the start of its next turn.
Pounce
The ancient white dragon moves up to half its Speed, and it makes one Rend attack.
Prepared Spells
Fear