- Armor Class: 18 (Natural Armor)
- Hit Points: 189 (18d10 + 90)
- Speed: 40 ft.
- Saving Throws: STR +9, CON +10, WIS +8, CHA +10
- Damage Resistances: Cold, Fire, Lightning; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
- Damage Immunities: Poison
- Condition Immunities: Poisoned
- Senses: Truesight 120 ft., Passive Perception 13
- Languages: Abyssal, Telepathy 120 ft.
- Challenge: 16 (15,000 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.
- 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.
| STR | DEX | CON | INT | WIS | CHA |
| 18 (+4) | 20 (+5) | 20 (+5) | 18 (+4) | 16 (+3) | 20 (+5) |
Attributes
| AC | 18 (Natural Armor) |
| Alignment | Chaotic Evil |
| CHA | 20 |
| CON | 20 |
| Challenge Rating | 16 |
| Condition Immunities | Poisoned |
| DEX | 20 |
| HP | 189 (18d10+90) |
| INT | 18 |
| Immunities | Poison |
| Languages | Abyssal, Telepathy 120 Ft. |
| Passive Perception | 13 |
| Resistances | Cold, Fire, Lightning; Bludgeoning, Piercing, and Slashing From Nonmagical Attacks |
| Roll 0 | Longsword 1d20 + 9 2d8+4 |
| Roll 1 | Tail 1d20 + 9 2d10+4 |
| STR | 18 |
| Saving Throws | Str +9, Con +10, Wis +8, Cha +10 |
| Senses | Truesight 120 Ft. |
| Size | Large |
| Speed | 40 ft. |
| Type | fiend (demon) |
| WIS | 16 |