Medium monstrosity (shapechanger, yuan-ti), neutral evil

Armor Class 12

Hit Points 66 (12d8+12)

Speed 30 ft.

16 (+3) 14 (+2) 13 (+1) 14 (+2) 12 (+1) 16 (+3)

Skills Deception +5, Stealth +4

Damage Immunities poison

Condition Immunities poisoned

Senses darkvision 60 ft.

Languages Abyssal, Common, Draconic

Challenge 3 (700 XP)

Shapechanger. The yuan-ti can use its action to polymorph into a Medium 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. It doesn’t change form if it dies.

Innate Spellcasting (Yuan_ti Form Only). The yuan_ti’s innate spellcasting ability is Charisma (spell save DC 13). The yuan_ti can innately cast the following spells, requiring no material components:

At will: animal friendship (snakes only)

3/day: suggestion

Magic Resistance. The yuan-ti has advantage on saving throws against spells and other magical effects.

Malison Type. The yuan_ti has one of the following types:

Type 1: Human body with snake head

Type 2: Human head and body with snakes for arms

Type 3: Human head and upper body with a serpentine lower body instead of legs


Multiattack (Yuan_ti Form Only). The yuan_ti makes two ranged attacks or two melee attacks, but can use its bite only once.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 5 (1d4 + 3) piercing damage plus 7 (2d6) poison damage.

Scimitar (Yuan_ti Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage.

Longbow (Yuan_ti Form Only). Ranged Weapon Attack: +4 to hit, range 150/600 ft., one target. Hit: 6 (1d8 + 2) piercing damage plus 7 (2d6) poison damage.