Ancient Boreal Dragon

Gargantuan Dragon chaotic neutral

• Armor Class: 22 (natural armor)
• Hit Points: 407 (22d20+176)
• Speed: walk 40 ft. fly 80 ft. swim 30 ft.
• Challenge Rating: 24 (62,000 XP)
• Source: Tome of Beasts 2, page 143

• Saving Throws: Dex +7, Con +15, Wis +11, Cha +11
• Skills: athletics +16, perception +18, stealth +7
• Damage Immunities: fire
• Damage Resistances: cold
• Senses: blindsight 60 ft., darkvision 120 ft., passive Perception 28
• Languages: Draconic, Giant

Special Abilities

• Ember Wreath (1/Day): As a bonus action, the boreal dragon wreathes its body in searing blue and white embers. The embers last for 1 minute or until the dragon uses its breath weapon. A creature that enters or starts its turn in a space within 30 feet of the dragon must make a DC 23 Constitution saving throw, taking 10 (3d6) fire damage on a failed save, or half as much damage on a successful one. If a creature fails the saving throw by 5 or more, it suffers one level of exhaustion as the water is sapped from its body by the unrelenting heat.
• 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: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage.
• Claw: Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.
• Tail: Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) 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 19 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.
• Cinder Breath (Recharge 5-6): The dragon exhales a 90-foot cone of superheated air filled with blue-white embers. Each creature in that area must make a DC 23 Dexterity saving throw, taking 88 (16d10) fire damage on a failed save, or half as much damage on a successful one.

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action 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.

Legendary Actions

• 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 feet of the dragon must succeed on a DC 23 Dexterity saving throw or take 16 (2d6 + 9) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

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