Ancient Boreal Dragon 2014

CR 24 dragon

Gargantuan dragon, chaotic neutral

Armor Class: 22 (natural armor)
Hit Points: 407 (22d20+176)
Speed: 40 ft., fly 80 ft., swim 30 ft.

STR29 (+9)

DEX10 (+0)

CON27 (+8)

INT17 (+3)

WIS19 (+4)

CHA18 (+4)

Saving Throws: Dexterity +7, Constitution +15, Wisdom +11, Charisma +11
Skills: Athletics +16, Perception +18, Stealth +7
Resistances: cold
Damage Immunities: fire
Senses: blindsight 60 ft., darkvision 120 ft., passive Perception 28
Languages: Draconic, Giant
Challenge: 24 (62,000 XP) · Proficiency Bonus +7

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.

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.

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.

Legendary Actions

Detect.

The dragon makes a Wisdom (Perception) check.

Tail Attack.

The dragon makes a tail attack.

Wing Attack (Costs 2 Actions).

Source: Tome of Beasts 2 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details