Ancalagon the Black

Legendary Resistance (3/Day). If Ancalagon fails a saving throw, he can choose to succeed instead.

Magic Resistance. Ancalagon has advantage on saving throws against spells and other magical effects.

Magic Weapons. Ancalagon’s weapon attacks are magical.

Inferno Aura. At the start of each of Ancalagon’s turns, each creature within 60 feet of him must make a DC 27 Constitution saving throw, taking 35 (10d6) fire damage on a failed save, or half as much damage on a successful one.

Multiattack. Ancalagon makes three attacks: one with his bite and two with his claws.

Bite. Melee Weapon Attack: +20 to hit, reach 20 ft., one target.
Hit: 49 (6d12 + 12) piercing damage plus 22 (4d10) fire damage.

Claw. Melee Weapon Attack: +20 to hit, reach 15 ft., one target.
Hit: 33 (4d8 + 12) slashing damage.

Tail. Melee Weapon Attack: +20 to hit, reach 25 ft., one target.
Hit: 40 (6d8 + 12) bludgeoning damage.

Breath of Annihilation (Recharge 5–6) Ancalagon exhales a storm of destructive fire in a 300-foot cone. Each creature in that area must make a DC 27 Dexterity saving throw, taking 182 (28d12) fire damage on a failed save, or half as much on a successful one. This attack ignores resistance to fire damage.

Winged Fury Ancalagon beats his massive wings furiously, sending out a wave of force. Each creature within 60 feet of him must make a DC 27 Strength saving throw. On a failed save, creatures take 44 (8d10) force damage and are pushed back 30 feet. On a success, they take half damage and are not pushed.

Baleful Flame Ancalagon can choose one creature he can see within 120 feet. That creature is engulfed in black flames until the end of Ancalagon's next turn. While engulfed, the creature takes 44 (8d10) fire damage at the start of its turn, and its speed is reduced by half. The flames persist until the creature succeeds on a DC 27 Constitution saving throw at the end of its turn or until the effect ends.

Shadow Slip Using his connection to the darkest powers of Morgoth, Ancalagon can momentarily shift through the shadows. He can teleport up to 120 feet to an unoccupied space he can see. Upon arriving, he leaves behind a cloud of choking smoke that heavily obscures the 20-foot radius area he teleports from until the start of his next turn.

Meteoric Fall
When Ancalagon is reduced to half his hit points or less by an attack, he can use his reaction to crash into the ground with immense force. All creatures within a 200-foot radius must make a DC 27 Strength or Dexterity saving throw (their choice). On a failed save, they take 70 (20d6) bludgeoning damage and are knocked prone. On a successful save, they take half as much damage and are not knocked prone. Ancalagon then rises to the air as part of this reaction, avoiding opportunity attacks.

Fiery Retribution
When Ancalagon is hit by a melee attack from within 10 feet, he can unleash a burst of flame in retaliation. The attacker must make a DC 27 Dexterity saving throw, taking 35 (10d6) fire damage on a failed save, or half as much on a successful one. This reaction ignores fire resistance.

Devastating Roar
If Ancalagon takes damage that reduces him to one-quarter of his hit points, he can roar in rage as a reaction. All creatures within 300 feet of him must succeed on a DC 27 Wisdom saving throw or become frightened for 1 minute. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. Additionally, the roar causes tremors in a 100-foot radius, forcing all creatures on the ground to make a DC 25 Dexterity saving throw or fall prone.

Ancalagon 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. Ancalagon regains spent legendary actions at the start of his turn.

• Tail Attack: Ancalagon makes a tail attack.

• Wing Attack (Costs 2 Actions): Ancalagon beats his wings. Each creature within 30 feet of him must succeed on a DC 27 Dexterity saving throw or take 30 (4d6 + 12) bludgeoning damage and be knocked prone. Ancalagon can then fly up to half his flying speed.

• Incinerating Breath (Costs 3 Actions): Ancalagon exhales a 60-foot cone of searing flame. Each creature in the area must make a DC 27 Dexterity saving throw, taking 65 (10d12) fire damage on a failed save, or half as much damage on a successful one.

Mythic Actions (Upon Ancalagon's first defeat, he regains full hit points and accesses these actions)

• Cataclysmic Crash: Ancalagon smashes into the ground, causing a shockwave in a 200-foot radius. All creatures in this area must make a DC 27 Strength saving throw or be knocked prone and take 88 (16d10) bludgeoning damage.

• Hurricane of Flame: Ancalagon summons a whirlwind of fire. All creatures within a 100-foot radius must make a DC 27 Dexterity saving throw, taking 77 (14d10) fire damage and becoming engulfed in flames 10d10 fire damage at the start of their turns) until they use an action to extinguish the flames.