Avatar of Desolation

Catastrophic Demise. The avatar explodes when it dies. If it wasn't slain with a glass blade bearing the avatar's true name, it reforms with all its Hit Points in an unoccupied space somewhere in the Abyss 1d10 days later. Dexterity Saving Throw: DC 23, each creature in a 30-foot Emanation originating from the avatar. Failure: 42 (12d6) Fire damage plus 42 (12d6) Force damage. Success: Half damage.

Fire Aura. The avatar sheds Bright Light in a 60-foot radius and Dim Light for an additional 60 feet. At the end of each of the avatar’s turns, each creature in a 5-foot Emanation originating from the avatar takes 20 Fire damage. A creature reduced to 0 Hit Points by this damage dies and its body disintegrates.

Legendary Resistance (3/Day). If the avatar fails a saving throw, it can choose to succeed instead.

Magic Resistance. The avatar has Advantage on saving throws against spells and other magical effects.

Multiattack. The avatar makes three Pincer or Immolate attacks.

Pincer. Melee Attack: +16, reach 10 ft. Hit: 30 (4d10 + 8) Piercing damage, and the target has the Grappled condition (escape DC 20) if it is Huge or smaller, and it has the Restrained condition until the grapple ends.

Immolate. Ranged Attack: +15, range 120 ft. Hit: 28 (8d6) Fire damage, and the target begins burning. A creature reduced to 0 Hit Points by this damage dies and its body disintegrates.

Spellcasting. The avatar casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 23):

At will: Fireball (level 5 version), Wall of Fire

1/Day Each: Dream, Project Image, Scrying

Teleport. The avatar teleports up to 60 feet to an unoccupied space it can see.

Reflective Carapace. Trigger: The avatar succeeds on a saving throw against a spell or a spell attack misses it. Response: The avatar chooses a different creature it can see within 120 feet to be the target of the spell instead.

Legendary Action Uses: 3. Immediately after another creature's turn, The avatar can expend a use to take one of the following actions. The avatar regains all expended uses at the start of each of its turns.

Charge. The avatar moves up to its Speed and makes a Pincer attack.

Fireball. The avatar uses Spellcasting to cast Fireball (level 5 version). The avatar can't take this action again until the start of its next turn.

Teleport. The avatar uses Teleport.