Large fiend, chaotic evil

Armor Class: 18

Hit Points: 189

Speed: 40 ft

STR

18 +4

DEX

20 +5

CON

20 +5

INT

18 +4

WIS

16 +3

CHA

20 +5

Saving Throws: STR +9, CON +10, WIS +8, CHA +10

Damage Resistances: Cold, Fire, Lightning; Nonmagical Bludgeoning, Piercing, and Slashing

Damage Immunities: Poison

Condition Immunities: Poisoned

Senses: Truesight 120ft., Passive Perception 13

Languages: Abyssal, Telepathy 120ft.

Challenge Rating: 16 ( 15000 XP)

Proficiency Bonus: +5

Actions

Multiattack. The marilith makes seven attacks: six with its longswords and one with its tail.

Longsword. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.   Tail. Melee Weapon Attack: +9 to hit, reach 10 ft., one creature. Hit: 15 (2d10 + 4) bludgeoning damage. If the target is Medium or smaller, it is grappled (escape DC 19). Until this grapple ends, the target is restrained, the marilith can automatically hit the target with its tail, and the marilith can't make tail attacks against other targets.   Teleport. The marilith magically teleports, along with any equipment it is wearing or carrying, up to 120 feet to an unoccupied space it can see.