Arcanthyr, The Verdant Canticle Eternal

Milil’s Divine Infusion. Arcanthyr is considered both a dragon and a celestial for spell and effect interactions. Allies within 120 feet have advantage on Performance, Persuasion, and saving throws against charm or fear.

Aura of Resonance. Creatures of Arcanthyr’s choice within 60 feet gain advantage on Intelligence, Wisdom, and Charisma saving throws.

Harmonic Wings. Opportunity attacks against Arcanthyr are made with disadvantage. When he flies, musical energy flows from his wings; hostile creatures within 20 feet have disadvantage on concentration checks.

Living Song. Whenever Arcanthyr deals psychic or thunder damage, he may choose to either deal an additional 10 (3d6) psychic damage or grant one ally within 60 feet advantage on their next roll.

Legendary Resistance (4/Day). If Arcanthyr fails a saving throw, he can choose to succeed instead.

Unusual Nature. Arcanthyr doesn’t require food or drink.

Multiattack. Arcanthyr makes three attacks: one with his bite and two with his claws, or two claws and one tail attack.

Bite. Melee Weapon Attack: +16 to hit, reach 15 ft., one target.
Hit: 32 (4d12 + 8) piercing damage plus 18 (4d8) psychic damage.

Claw. Melee Weapon Attack: +16 to hit, reach 10 ft., one target.
Hit: 24 (4d8 + 8) slashing damage.

Tail. Melee Weapon Attack: +16 to hit, reach 25 ft., one target.
Hit: 28 (4d10 + 8) bludgeoning damage; DC 25 Strength save or prone.

Breath Weapons (Recharge 5–6)

Arcanthyr can use either breath weapon.

🧠🎵 Breath of Emerald Chorus (Psychic — Special). Arcanthyr exhales a 120-foot cone of shimmering green psychic sound, filled with overlapping voices and harmonic resonance. DC 25 Intelligence save. Failure: 99 (18d10) psychic damage and stunned until the end of the creature’s next turn. Success: Half damage, not stunned. Creatures immune to charm instead have disadvantage on the next save they make.

🎼🌿 Breath of the Verdant Anthem (Supportive). Arcanthyr exhales a wave of radiant green musical energy in a 90-foot cone. Allies regain 70 (20d6) hit points. Allies end one charm, fear, or stun effect. Allies gain advantage on attack rolls and saving throws until the end of their next turn

Change Shape. Arcanthyr magically transforms into any creature that is Medium or Small, while retaining his game statistics (other than his size). This transformation ends if Arcanthyr is reduced to 0 hit points or uses a bonus action to end it.

Psychic Step. Arcanthyr magically teleports to an unoccupied space he can see within 60 feet of it.

Arcanthyr can take 3 legendary actions.

Resonant Pulse. One creature within 120 feet takes 21 (6d6) psychic damage.

Crescendo Glide. Arcanthyr moves up to half his flying speed without provoking opportunity attacks.

Final Chord (Costs 2 Actions).
One creature must succeed on a DC 25 Wisdom save or be incapacitated until the end of its next turn as reality resonates through them.

The Eternal Canticle

When Arcanthyr is reduced to 0 HP, his body dissolves into light and sound. He reforms moments later, regaining 300 HP, as a choir of celestial voices fills the battlefield.

Effects:

• Allies regain 15 HP at the start of their turns

• Hostile creatures have disadvantage on saving throws

• Arcanthyr’s breath weapons recharge immediately

• He gains one additional legendary action per round