Large Fiend (Demon), Chaotic Evil

Statistics

Armor Class: 16
Hit Points: 220 (21d10 + 105)
Initiative: +10 (score 20)
Speed: Walk 40 ft., Climb 40 ft.
Challenge: CR 16, 15,000 XP, proficiency bonus +5

Abilities

Strength: 18 (+4); save +9
Dexterity: 20 (+5); save +5
Constitution: 20 (+5); save +10
Intelligence: 18 (+4); save +4
Wisdom: 16 (+3); save +8
Charisma: 20 (+5); save +10

Skills

Perception: +8

Defenses

Damage Resistances: Cold, Fire, Lightning
Damage Immunities: Poison
Condition Immunities: Poisoned

Senses and Languages

Senses: Truesight 120 ft.; Passive Perception 18
Languages: Abyssal; telepathy 120 ft.

Traits

Demonic Restoration. If the marilith dies outside the Abyss, its body dissolves into ichor, and it gains a new body instantly, reviving with all its Hit Points somewhere in the Abyss.

Magic Resistance. The marilith has Advantage on saving throws against spells and other magical effects.

Reactive. The marilith can take one Reaction on every turn of combat.

Actions

Multiattack. The marilith makes six Pact Blade attacks and uses Constrict.

Pact Blade. Melee Attack Roll: +10, reach 5 ft. Hit: 10 (1d10 + 5) Slashing damage plus 7 (2d6) Necrotic damage.

Constrict. Strength Saving Throw: DC 17, one Medium or smaller creature the marilith can see within 5 feet. Failure: 15 (2d10 + 4) Bludgeoning damage. The target has the Grappled condition (escape DC 14), and it has the Restrained condition until the grapple ends.

Bonus Actions

Teleport (Recharge 5–6). The marilith teleports up to 120 feet to an unoccupied space it can see.

Reactions

Parry. Trigger: The marilith is hit by a melee attack roll while holding a weapon. Response: The marilith adds 5 to its AC against that attack, possibly causing it to miss.