Dronning Mølle

Dronning's Wurm. The chest cavity of the Dronning harbours a symbiotic worm-like creature. When the Dronning is killed, the wurm must be killed or granted a new host. if neither of these occur within 1d4 hours, it explodes. All creatures within a 500ft radius, regardless of cover, must make a DC20 Con save, or take 10d10 Necrotic damage and are knocked unconscious. On a successful save, they have the poisoned condition for 24 hours, and are knocked unconcious.

Killing the worm:  The worm has 50 hit points, with an AC of 13. It is immune to all non-magical damage

Giving it a Host. The new host must be willing. A chest cavity must be formed, and the worm placed inside before the creature dies. A chitinous growth covers the wound when the wurm is placed inside. If the host creature is not a Monstrosity, they must roll 1d20 at the start of a long rest and deduct the total number of creatures they have killed since their last long rest. Their Hit Point Maximum is reduced by the total, All the while they are a Host, their Hit Point Max cannot be increased.

Wurm Host. creature that hosts the wurm gains the below abilities.

Trickery of The Wurm. As an action, the host can create two illusory duplicates within 50 feet of itself. As part of the same action, and as an action on subsequent turns, they can swap places with one of the duplicates. Each Duplicate has the same AC as the host, and 50 Hit Points. They move at the same time as the Host, mimicing their movements, but do no damage. Slashing, Piercing or Bludgeoning damage from non magical weapons reveal the duplicate to be an illusion, as does a DC17 Intelligence check

False Ascendence of The Wurm. As an action, the host can disintegrate into glowing moths that fade after a minute as if dying a painful death. They reform in the same location at dawn the next day, with all the benefits of a long rest

Brood of The Wurm: As a bonus action the host can release a number of glowing moths up to their con modifier (minimum 1). These moths all seek a nearby target, and deal either 2d10 necrotic damage, or provide 2d10 healing. The host takes damage equal to half the total damage and healing distributed

Multi Attack. The Dronning makes 3 attacks that are a combination of Claws and lunar beam

Claws. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 3) Slashing damage. The Dronnig's claws bypass magical resistance

Lunar Beam. RangedWeapon Attack: +10 to hit, range 50/100 ft., one target. Hit: 13 (2d6 + 5) radiant damage.

Dashing Flight. The Dronning moves 20ft with a strong beat of its wings. Any enemies must pass a DC15 Strength save against the gust of wind from her wings if they want to make an attack of Opportunity.

Defend the Wurm. If more than three enemies of the Dronning are within 5ft of it, it lets out a shrill cry that deals 11 (1d8 + 5) Necrotic Damage, and pushes all enemies 10ft away if they fail a DC15 Strength Save

The Dronning Mølle is a Legendary creature, and can take 3 legendary actions per round

Flight of the Mølle (Costs 1 Action). The Dronning can fly in any direction up to its movement speed

Lunar Beam (Costs 1 Action). The Dronning Makes a singular Lunar Beam attack

Dismiss Illusion (costs 3 Actions.). The Dronning Causes one of her Duplicates to explode, causing all targets within 30ft to take 4d6 Necrotic Damage if they fail a DC15 Dex save. on a success, they take half damage