Medium fey, neutral good

Armor Class: 17 (natural armor)

Hit Points: 204

Speed: 30 ft

STR

16 +3

DEX

20 +5

CON

18 +4

INT

20 +5

WIS

18 +4

CHA

20 +5

Saving Throws: CON +10, WIS +10, CHA +11

Skills: Arcana +11, Perception +10

Damage Resistances: Acid; Bludgeoning, Piercing, and Slashing (attacks not made with Cold Iron Weapons)

Damage Immunities: Cold, Fire, Poison

Condition Immunities: Charmed, Frightened, Poisoned

Senses: Blindsight 30ft., Darkvision 120ft., Passive Perception 20

Languages: Abyssal, Celestial, Common, Draconic, Elvish, Infernal, Telepathy 120ft., Umbral

Challenge Rating: 17 ( 18000 XP)

Proficiency Bonus: +6

Actions

Multiattack. The Moonlit King makes three Crystal Staff or Moon Bolt attacks. He can replace one attack with a use of Spellcasting. If two Crystal Staff attacks hit one creature, the target must succeed on a DC 19 Constitution saving throw or be stunned until the end of its next turn.   Crystal Staff. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage plus 14 (4d6) radiant damage.   Moon Bolt. Ranged Spell Attack: +11 to hit, range 120 ft., one target. Hit: 27 (4d10 + 5) radiant damage, and the target sheds dim light in a 10-foot radius until the end of its next turn. If the target is a creature in a form other than its true form, it takes an extra 11 (2d10) radiant damage and must succeed on a DC 19 Charisma saving throw or revert to its true form.   Animate Shadows (Recharge 5–6). The Moonlit King causes the shadows of up to three creatures he can see within 60 feet of him to animate and attack their owners. Each target must make a DC 19 Dexterity saving throw. On a failure, a creature takes 49 (14d6) necrotic damage, and its Strength score is reduced by 1d4. On a success, a creature takes half the damage, and its Strength score isn’t reduced. This reduction lasts until the creature finishes a long rest. The creature dies if this effect reduces its Strength to 0.   Summon Devil (1/Day). The Moonlit King magically calls a Lunar Devil to aid him. The devil arrives in 1d4 rounds, acting as ally of the Moonlit King and obeying his spoken commands. The devil remains for 1 hour, until the Moonlit King dies, or until the King dismisses it as a bonus action.

Bonus Actions

Moonlight Step. The Moonlit King teleports, along with any equipment he is wearing or carrying, up to 60 feet to an unoccupied space he can see. The origin and destination spaces must contain moonlight.

Reactions

Shadow Slip. When a creature the Moonlit King can see within 30 feet of him attacks him, he takes on the quality of his manifest delusions, temporarily becoming ghostly. The attack roll has disadvantage, and if it hits, the Moonlit King takes only half the damage from the attack.

Legendary Actions

The Moonlit King can take 3 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. The Moonlit King regains spent legendary actions at the start of his turn.   Move. The Moonlit King moves up to his speed without provoking opportunity attacks.   Shift Moonlight. The Moonlit King changes the brightness of each area of moonlight he can see within 120 feet of him from dim light to bright light or vice versa.   Attack (Costs 2 Actions). The Moonlit King makes a Crystal Staff or Moon Bolt attack.   Spread Madness (Costs 2 Actions). Each creature within 30 feet of the Moonlit King must succeed on a DC 19 Wisdom saving throw or suffer short-term madness. The Moonlit King can use this legendary action only when he is in moonlight.

Lair Actions

On initiative count 20 (losing initiative ties), the Moonlit King takes a lair action to cause one of the following effects; the Moonlit King can’t use the same effect two rounds in a row:

• Frightful Whispers. Disembodied whispers speaking of despair and failure erupt from a point the Moonlit King can see within 120 feet of him. Each non-Fiend creature within 15 feet of that point must succeed on a DC 19 Wisdom saving throw or be frightened until the end of its next turn.
• Maddening Hallucinations. Shadows and moonlight dance around up to three creatures the Moonlit King can see within 60 feet of him. Each target must succeed on a DC 19 Wisdom saving throw or be incapacitated until the end of its next turn as hallucinations fill its mind. If the saving throw fails by 5 or more, the target suffers short-term madness.
• Moonlit Illumination. Four beams of moonlight appear on points the Moonlit King can see within 120 feet of him. Each beam sheds dim light in a 10-foot radius centered on a point. The moon beams last until the Moonlit King uses this lair action again or until he dies.

The Moonlit King’s lair is the Tower of the Moon, which is hidden in a spiral labyrinth deep within the Plane of Shadows. The tower is a run-down, forlorn place filled with false whispers and shadow ghosts of the mad fey lord’s own creation.

Regional Effects

The region containing the Moonlit King’s lair is warped by his magic, which creates one or more of the following effects:

• Constant Moonlight. Weather conditions don’t inhibit moonlight shining within 10 miles of the lair—clouds part, rain seems to channel moonbeams, and snow takes on a luminous silver glow.
• Stryx Network. The area within 5 miles of the Moonlit King’s lair attracts hundreds of stryxes and owls. The King can choose to see or hear through the senses of any stryx or owl in this area.
• Waking Dreams. Dreams and fears take on a life of their own. Minor visual and auditory hallucinations plague creatures within 3 miles of the lair.

Suggested Environments

Urban