Biwabokuboku Yōkai

Harmonious Presence. Any creature that starts its turn within 30 feet of the Biwabokuboku and can hear her music must succeed on a DC 17 Wisdom saving throw or have disadvantage on saving throws against being charmed until the start of its next turn.

Mystic Biwa. The Biwabokuboku’s biwa is a magical instrument. When she plays it, her spell save DC increases by 2 (already calculated in her abilities). If the biwa is taken from her, her spell save DC drops by 2 until she retrieves it.

Unnerving Beauty. When a creature attacks the Biwabokuboku for the first time in a turn, the attacker must make a DC 17 Charisma saving throw. On a failed save, the creature becomes charmed by the Biwabokuboku until the end of its next turn. While charmed in this way, the creature must use its movement to approach the Biwabokuboku, and it can’t make attacks against her or any other creature.

Melodic Resistance. The Biwabokuboku has advantage on saving throws against spells and other magical effects.

Eternal Music. If the Biwabokuboku is reduced to 0 hit points while playing her biwa, she can use her reaction to continue playing and cast a spell that has a casting time of 1 action or 1 bonus action. She can do this even if she has already taken her turn in the current round.

One-Eyed Insight. The Biwabokuboku’s single eye allows her to see through illusions and invisibility. She has truesight out to a range of 60 feet.

Spellcasting.

The Biwabokuboku’s spellcasting ability is Charisma (spell save DC 17, +9 to hit with spell attacks). It can innately cast the following spells, requiring no material components:

• At will: Minor Illusion, Vicious Mockery
• 3/day each: Charm Person, Invisibility, Misty Step
• 1/day each: Hypnotic Pattern, Fear

One-Eyed Gaze. The Biwabokuboku can focus its single eye on a creature within 30 feet. The target must succeed on a DC 17 Wisdom saving throw or be charmed for 1 minute. The charmed target can make another Wisdom saving throw at the end of each of its turns, ending the effect on a success.

Ethereal Melody. As an action, the Biwabokuboku can play her biwa to cast a spell or create an enchanting melody. All creatures within 60 feet that can hear her must make a DC 17 Wisdom saving throw. On a failed save, creatures are charmed for 1 minute. While charmed in this way, creatures have disadvantage on attack rolls and ability checks. Creatures can make another Wisdom saving throw at the end of each of their turns, ending the effect on a success.

Misty Escape. When the Biwabokuboku takes damage, she can use her reaction to turn invisible and teleport up to 30 feet to an unoccupied space she can see. She remains invisible until the start of her next turn or until she attacks or casts a spell.

Multiattack. The Biwabokuboku makes two attacks with her Biwa Strike she can swap one of these attacks with her haunting song.

Biwa Strike. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage plus 7 (2d6) psychic damage.

Haunting Song (Recharge 5-6). The Biwabokuboku plays a haunting melody. Each creature within 30 feet of her that can hear the song must make a DC 17 Wisdom saving throw. On a failed save, a creature takes 21 (6d6) psychic damage and is stunned until the end of its next turn. On a successful save, a creature takes half damage and isn’t stunned.

The Biwabokuboku can use a bonus action to cast Fear (spell save DC 17) without expending a spell slot.

Melodic Counter. When a creature the Biwabokuboku can see within 30 feet casts a spell, she can use her reaction to play a counter-melody. The caster must succeed on a DC 17 Charisma saving throw or the spell fails and is wasted.

Legendary Actions:

The Biwabokuboku 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 Biwabokuboku regains spent legendary actions at the start of her turn.

• Move. The Biwabokuboku moves up to her speed without provoking opportunity attacks.
• Melodic Distraction. The Biwabokuboku targets one creature she can see within 30 feet. The target must succeed on a DC 17 Wisdom saving throw or have disadvantage on the next attack roll it makes before the end of its next turn.
• Play Biwa (Costs 2 Actions). The Biwabokuboku casts a spell or uses her Ethereal Melody.

Eternal Concert (1/Day). When the Biwabokuboku is reduced to 0 hit points, she does not die or fall unconscious. Instead, she can choose to regain 85 hit points and continue fighting. Additionally, for the next minute, she gains the following benefits:

• She can use her Haunting Song without needing to roll for recharge.
• All creatures within 60 feet that can hear her music must succeed on a DC 17 Wisdom saving throw at the start of each of their turns or be charmed until the start of their next turn.
• She becomes resistant to all damage types.