Vyraxion the Hollow Flame

1. Towerforged

Vyraxion is intrinsically linked to the Great Ascension. While within the tower or on its roots (such as the Climb of 5 Peaks), Vyraxion cannot be banished, teleported unwillingly, or sent to another plane. If targeted by such effects, the spell fizzles and the caster takes 4d6 psychic damage from magical backlash.

2. Corpsefire Core

Vyraxion’s heart is a furnace of undeath. If it kills a creature with its breath weapon or Soulfire Aura, the corpse rises at the start of Vyraxion's next turn as a Hollow Flame Wight (use Wight stat block with added fire/cold resistance and radiant vulnerability). The undead obey Vyraxion for 1 minute or until destroyed.

3. Sovereign of the Hollow Flame

Undead and fiends within 60 feet of Vyraxion have advantage on saving throws and deal an additional +3 fire or cold damage (Vyraxion's choice) with weapon attacks.

Multiattack.

Vyraxion makes three attacks: one with its bite and two with its claws.

• Bite. Melee Weapon Attack: +15 to hit, reach 10 ft., one target.
  Hit: 22 (2d10 + 8) piercing damage plus 14 (4d6) necrotic damage.

• Claw. Melee Weapon Attack: +15 to hit, reach 5 ft., one target.
  Hit: 18 (2d8 + 8) slashing damage.

Breath Weapon (Recharge 5–6).

Vyraxion exhales hollow frostflame in a 90-foot cone. Each creature in that area must make a DC 22 Dexterity saving throw, taking 72 (16d8) cold and fire damage (split evenly) on a failed save, or half as much on a success.

• Undead and fiends are healed by this breath instead of harmed.

Hollow Gaze (1/Day).

Vyraxion targets one creature within 60 feet that it can see. The target must make a DC 20 Charisma saving throw. On a failure, it is overwhelmed by visions of death and betrayal, becoming paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns. On a success, the effect ends.

1. Frostfire Surge (Recharge 4–6)

Vyraxion channels ambient necromantic energy to empower itself. Until the start of its next turn:

• Its melee attacks deal +2d6 cold damage

• Creatures that hit it with melee attacks take 5 cold and 5 fire damage

2. Wyrmbound Roar (Once per short rest)

Vyraxion unleashes a hateful roar. All creatures of its choice within 30 feet must succeed on a DC 20 Wisdom saving throw or be frightened until the end of their next turn. Undead and fiends instead gain 10 temporary hit points.

3. Soul Shackle

Vyraxion targets one enemy it can see within 60 feet. That creature must succeed on a DC 18 Charisma saving throw or be shackled by spectral chains of flame and bone. The target’s speed is halved until the end of Vyraxion’s next turn.

1. Withering Riposte

When a creature within 10 feet hits Vyraxion with a melee attack, Vyraxion can retaliate with a burst of necrotic flame. That creature takes 3d10 necrotic damage, half on a DC 20 Constitution save.

2. Dread Wing Cloak

When Vyraxion would take area-of-effect damage (e.g., Fireball, Cone of Cold), it can shield itself with a wing of frostflame, reducing the damage taken by half after saves are applied. Nearby creatures (within 10 ft) must make a DC 18 Dexterity save or take 2d8 cold damage from the backlash.

3. Soulflare Counter

When a creature casts a healing spell or uses a feature to regain hit points within 60 feet, Vyraxion can pulse with anti-life energy, forcing the creature to make a DC 19 Wisdom save or regain half as many hit points, and take 4d6 necrotic damage.

Vyraxion 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.

• Tail Smash. Vyraxion makes one tail attack: +15 to hit, 2d10 + 8 bludgeoning, 15-foot reach.

• Wing Buffet (Costs 2 Actions). Vyraxion beats its wings. Each creature within 15 feet must succeed on a DC 22 Strength save or be knocked prone and take 2d8 + 8 bludgeoning damage.

• Hollow Flame Surge (Costs 3 Actions). Vyraxion surges with corrupted frostflame. Every creature within 30 feet takes 18 (4d8) fire and cold damage unless it succeeds on a DC 20 Constitution save.