Erinyes

Medium fiend · CR 12

Armor Class 18

Hit Points 153 (18d8+72)

Speed fly 60 ft., 30 ft.

STR 18 +4

DEX 16 +3

CON 18 +4

INT 14 +2

WIS 14 +2

CHA 18 +4

Saving Throws CHA+8, CON+8, DEX+7, WIS+6

Damage Resistances cold; bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons

Damage Immunities fire, poison

Condition Immunities poisoned

Senses truesight120 ft. , passive Perception 12

Languages Infernal, telepathy 120 ft.

Traits

Hellish Weapons.: The erinyes's weapon attacks are magical and deal an extra 13 (3d8) poison damage on a hit (included in the attacks).
Magic Resistance.: The erinyes has advantage on saving throws against spells and other magical effects.

Multiattack.: The erinyes makes three attacks
Longsword. Melee/Ranged Weapon Attack: +8 to hit.: Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage, or 9 (1d10 + 4) slashing damage if used with two hands, plus 13 (3d8) poison damage.
Longbow. Melee/Ranged Weapon Attack: +7 to hit.: Ranged Weapon Attack: +7 to hit, range 150/600 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 13 (3d8) poison damage, and the target must succeed on a DC 14 Constitution saving throw or be poisoned. The poison lasts until it is removed by the lesser restoration spell or similar magic.
Variant: Rope of Entanglement.: Some erinyes carry a rope of entanglement (detailed in the Dungeon Master's Guide). When such an erinyes uses its Multiattack, the erinyes can use the rope in place of two of the attacks.

Parry.: The erinyes adds 4 to its AC against one melee attack that would hit it. To do so, the erinyes must see the attacker and be wielding a melee weapon.