Yuan-ti Anathema

Huge monstrosity (shapechanger, yuan-ti), Neutral Evil

Armor Class

16 (natural armor)

Hit Points

189 (18d12+72)

Speed

walk 40 ft., climb 30 ft., swim 30 ft.

Skills

Perception +7, Stealth +5

Damage Resistances

acid, fire, lightning

Damage Immunities

poison

Condition Immunities

poisoned

Senses

darkvision 60 ft.

Languages

Abyssal, Common, Draconic

Challenge

12

Magic Resistance

The anathema has advantage on saving throws against spells and other magical effects.

Ophidiophobia Aura

Any creature of the anathema's choice, other than a snake or a yuan-ti, that starts its turn within 30 feet of the anathema and can see or hear it must succeed on a DC 17 Wisdom saving throw or become frightened of snakes and yuan-ti. A frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target's saving throw is successful or the effect ends for it, the target is immune to this aura for the next 24 hours.

Shapechanger

The anathema can use its action to polymorph into a Huge giant constrictor snake, or back into its true form. its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed.

Six Heads

The anathema has advantage on Wisdom (Perception) checks and on saving throws against being blinded. charmed, deafened, frightened, stunned, or knocked unconscious.

Innate Spellcasting (Anathema Form Only)

The anathema's innate spellcasting ability is Charisma (spell save DC 17). It can innately cast the following spells, requiring no material components: • At will: animal friendship (snakes only) • 1/Day: divine word • 3/Day each: darkness, entangle, fear, haste, suggestion, polymorph

Actions

Multiattack (Anathema Form Only)

The anathema makes two claw attacks, one constrict attack, and one Flurry of Bites attack.

Claw (Anathema Form Only)

Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Constrict

Melee Weapon Attack: +10 to hit, reach 15 ft., one Large or smaller creature. 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage, and the target is grappled (escape DC 16). Until this grapple ends, the target is restrained and takes 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage at the start of each of its turns, and the anathema can't constrict another target.

Flurry of Bites

Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 27 (6d6 + 6) piercing damage plus 14 (4d6) poison damage.

Variant: Acid Slime

As a bonus action, the yuan-ti can coat its body in a slimy acid that lasts for 1 minute. A creature that touches the yuan-ti, hits it with a melee attack while within 5 feet of it, or is hit by its constrict attack takes 5 (1d10) acid damage.

Variant: Chameleon Skin

The yuan-ti has advantage on Dexterity (Stealth) checks made to hide.

Variant: Shed Skin (1/Day)

The yuan-ti can shed its skin as a bonus action to free itself from a grapple, shackles, or other restraints. If the yuan-ti spends 1 minute eating its shed skin, it regains hit points equal to half its hit point maximum.

Yuan-ti Anathema

Huge monstrosity, typically neutral evil

Armor Class

16 (natural armor)

Hit Points

189 (18d12 + 72)

Speed

walk 40 ft., climb 40 ft., swim 40 ft.

Skills

Perception +11, Stealth +5

Damage Resistances

acid, fire, lightning

Damage Immunities

poison

Condition Immunities

poisoned

Senses

blindsight 30 ft., darkvision 60 ft.

Languages

Abyssal, Common, Draconic

Challenge

12

Proficiency Bonus

+4

Magic Resistance

The anathema has advantage on saving throws against spells and other magical effects.

Ophidiophobia Aura

Any creature of the anathema's choice, other than a snake or a yuan-ti, that starts its turn within 30 feet of the anathema must succeed on a DC 17 Wisdom saving throw or become frightened of snakes and yuan-ti. A frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target's saving throw is successful or the effect ends for it, the target is immune to this anathama's aura for the next 24 hours.

Six Heads

The anathema has advantage on saves against being blinded, charmed, deafened, frightened, stunned, or knocked unconscious.

Actions

Multiattack (Anathema Form Only)

The anathema makes two Claw attacks and one Flurry of Bites attack.

Claw (Anathema Form Only)

Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Flurry of Bites (Anathema Form Only)

Melee Weapon Attack: +10 to hit, reach 10 ft., one creature. Hit: 27 (6d6 + 6) piercing damage plus 14 (4d6) poison damage.

Constrict (Snake Form Only)

Melee Weapon Attack: +10 to hit, reach 15 ft., one Large or smaller creature. Hit: 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage, and the target is grappled (escape DC 16). Until this grapple ends, the target is restrained, and it takes 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage at the start of each of its turns. The anathema can constrict only one creature at a time.

Spellcasting (Anathema Form Only)

The anathema casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 17): • At will: animal friendship (snakes only) • 3/Day each: darkness, entangle, fear, polymorph, suggestion

Change Shape (Bonus Action)

The anathema transforms into a Huge constrictor snake or back into its true form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed.