Yuan-Ti Abomination

Yuan-Ti Abomination CR: 7

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

Armor Class: 15 (natural armour)

Hit Points: 127 15d10+45

Speed: 40 ft

STR

19 +4

DEX

16 +3

CON

17 +3

INT

17 +3

WIS

15 +2

CHA

18 +4

Skills: Perception +5, Stealth +6

Damage Immunities: Poison

Condition Immunities: Poison

Senses: Darkvision 60 ft, passive Perception 15

Languages: Abyssal, Common, Draconic

Challenge Rating: 7

Innate Spellcasting (Abomination Form Only). The yuan-ti's innate spellcasting ability is Charisma (spell save DC 15). The yuan-ti can innately cast the following spells, requiring no material components.

At will: Animal Friendship (snakes only).

1/day: Fear.

3/day: Suggestion.

Shaperchanger. The yuan-ti can use it's action to polymorph into a Large snake or back into it's true form. The 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.
Magic Resistance. The yuan-ti has advantage on saving throws against spells and other magical effects.

Actions

Multiattack (Abomination Form Only). The yuan-ti makes two ranged attacks or three melee attacks, but can use it's bite and constrict attacks only once each.
Bite. Melee Weapon Attack +7 to hit, reach 5 ft, one creature. Hit 7 1d6+4 piercing damage plus 10 3d6 poison damage.
Constrict. Melee Weapon Attack +7 to hit, reach 10 ft, one target. Hit 11 2d6+4 bludgeoning damage, and the target is grappled (escape DC 14). Until the grapple ends, the target is restrained, and the yuan-ti can't constrict another target.
Scimitar (Abomination Form Only). Melee Weapon Attack +7 to hit, reach 5 ft, one target. Hit 11 2d6+4 slashing damage.
Longbow (Abomination Form Only). Ranged Weapon Attack +6 to hit, range 150/600 ft, one target. Hit 12 2d8+3piercingdamageplus10[roll:3d6 poison damage.

Abominations are made up of a large snake body & head, and the torso & arms of a strong muscular humanoid body. The whole body is scaled, with no hair or other skin. The abominations are the standard leaders of Yuan-Ti regions where they dominate the surrounding  area. They perform dark rituals, and involve their lesser brethren in helping to bring about world domination.

Suggested Environments

Tropical and Sub-Tropical regions