Bai Suzhen, The White Snake Witch

Medium Celestial, Chaotic Evil

AC 20
HP 225 (30d8 + 90)
Speed 40 ft., Burrow 60 ft.   

STR 20 (5)  DEX 16 (3)  CON 16 (3)  INT 18 (4)  WIS 12 (1)  CHA 22 (6) 

Saving Throws: Dexterity +10, Constitution +10, Charisma +13
Skills: Athletics +12, Arcana +11, Deception +20, Intimidation +13, Nature +11, Perception +11, Persuasion +13
Damage Resistances: Bludgeoning, Slashing, and Piercing
Damage Immunities: Poison, Psychic
Condition Immunities: Charmed, Frightened, Poisoned 
Senses: Tremorsense 60ft. Darkvision 120ft. Passive Perception 20
Languages: Common, Celestial, Draconic, Primordial
CR: 24 (PB+7)

TRAITS

Legendary Resistance (3/Day) - If Bai Suzhen fails a saving throw, she can choose to succeed instead.

Magic Resistance - Bai Suzhen has advantage on saving throws against spells and other magical effects.

Potent Venom - When Bai Suzhen deals Poison damage to a creature, it ignores Resistance to Poison damage. Additionally, if a creature attempts to make a Saving Throw against Poison damage or the Poisoned condition granted by one of Bai Suzhen’s spells or abilities, that Saving Throw is made with Disadvantage.

Serpent’s Tongue - Bai Suzhen has Advantage on all Charisma based skill checks. 

Toxic Awareness - Bai Suzhen is able to sense the location of poisons, poisonous and venomous creatures, magical contagions, and creatures suffering from the Poisoned condition within 60 ft. of her. 

ACTIONS

Multiattack - Bai Suzhen makes two Titanoboa Glaive attacks. She can replace any Titanoboa Glaive attack with a Serpent's Spit attack. 

Titanoboa Glaive -  Melee Attack Roll: +15 to hit, reach 10 ft. Hit: 13 (1d10+8) Slashing damage and 14 (4d6) Poison damage. On a hit, the target must make a DC 21 Constitution saving throw. Failure: The creature becomes Poisoned. While Poisoned in his way, a creature can only remove the condition with a spell that ends the condition or a Long Rest. 

Serpent’s Spit - Ranged Attack Roll: +13 to hit, range 100 ft. Hit: 10 (4d4) Acid damage. A creature hit by this attack must make a DC 21 Dexterity Saving Throw. Failure: The creature is Blinded until the end of their next turn. 

Power of Poison (Recharge 5-6) - All creatures within 120 ft. who have the Poisoned condition, must make a DC21 Constitution saving throw, as Bai Suzhen psychically amplifies the venom in their veins. Failure: 55 (10d10) Poison damage and the creature is Paralyzed until the end of their next turn. Success: Half damage and the creature is not Paralyzed.

Make My Glaive Grow! (1/LR) - Bai Suzhen can throw her Glaive to any point within 60 ft., releasing the enslaved spirit inside and causing the Glaive to morph into a massive Titanoboa (use Titanoboa Spirit listed in Titanoboa Glaive). The creature fights to defend its master, but while active, Bai Suzhen may not use her Titanoboa Glaive attack. Upon destroying the creature, it transforms back into the Titanboa Glaive and magically returns to Bai Suzhen.

Spellcasting - Bai Suzhen casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 21) 

At will: Absorb Elements, Charm Person, Command, Detect Magic, Purify Food and Drink, Alter Self, Detect Thoughts, Enlarge / Reduce, Lesser Restoration, Clairvoyance, Hypnotic Pattern, 

3/day each: Dimension Door, Polymorph, Stone Skin, Vitriolic Sphere (Level 6 version), Cloudkill (Level 6 version), Contagion, Dominate Person, Geas, Planar Binding, Wall of Stone, Contingency, Eyebite, Flesh to Stone, Tasha’s Bubbling Cauldon, Teleport

1/day each: Clone, Earthquake, Astral Projection, Wish

BONUS ACTIONS 

Slippery Escape - Bai Suzhen immediately Burrows underground and moves up to 30 ft. This movement does not provoke opportunity attacks. 

REACTIONS

Spellcaster’s Bane (3/day) - Bai Suzhen casts Counterspell in response to the spell’s trigger. If the Counterspell is successful, the creature who triggered the spell becomes Poisoned until the end of its next turn. If the creature already has the Poisoned condition, it takes 14 (4d6) Poison damage instead. 

LEGENDARY ACTIONS

Bai Suzhen 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. Bai Suzhen regains spent legendary actions at the start of her turn.

Titanboa Glaive - Bai Suzhen attacks with her Titanoboa Glaive.

Serpent’s Spit - Bai Suzhen attacks with her Serpent’s Spit

Spellcasting (Costs 2 Actions) - Bai Suzhen uses her Spellcasting. 

Minions of Earth and Bone (Costs 3 actions) -   Bai Suzhen summons a Bone Naga ally, at a point within 30 ft. Bai Suzhen cannot summon more than 4 Bone Nagas per day.