Baron Von Alvilág

Everlasting Embers. If Alvilág reaches 0 hit points, his body disintegrates in a flash of fire and swirl of smoke which returns to his bottle unless it is broken. His body may reform in 1d6 days later, fully recovered.

Conflagration Constitution. Alvilág's body is wreathed in red flames, add his charisma modifier to his AC. Additionally when struck by a melee attack the attacker takes 6 (3d4) fire damage.

False Appearance. While Alvilág remains within open flames, he is indistinguishable from an ordinary fire.

Innate Spellcasting. Alvilág's innate spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). he can innately cast the following spells, requiring no material components:

At will: control flames, dancing lights, prestidigitation

3/day each: conjure minor elementals (fire elementals only), dispel magic, faerie fire, fireball, gaseous form, glyph of warding, hellish rebuke, identify, invisibility, pyrotechnics

1/day each: conjure elemental (fire elementals only), guards and wards, planar binding, plane shift

Legendary Resistance (2/Day). If Alvilág fails a saving throw, it can choose to succeed instead.

Nimble Flames. Alvilág can take the Disengage or Hide action as a bonus action on each of its turns.

Multiattack. Alvilág makes two Claw attacks or uses its Hurl Flame twice.

Claws. Melee Weapon Attack: +10 to hit, reach 5 ft., one creature. Hit: 3 (1d4 + 1) slashing damage plus 6 (3d4) fire damage. If the target is a creature or a flammable object, it ignites. Until a creature takes an action to douse the fire, the target takes 5 (1d10) fire damage at the start of each of its turns.

Hurl Flame. Ranged Spell Attack: +10 to hit, range 120 ft., one target. Hit: 10 (4d4) fire damage.

Alvilág can take 2 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. Alvilág regains spent legendary actions at the start of its turn.

Conjure Fire Mephit (Lair Only). Alvilág may summon a single Magma, Steam, or Smoke Mephit.

Attack. Alvilág makes a claw or hurl flame attack

Cast spell (Costs 2 Actions). Alvilág Casts a spell.