Lamia

Large monstrosity, chaotic evil

Armor Class: 13 (natural armor)
Hit Points: 97 (13d10+26)
Speed: 30 ft.

STR: 16 (+3)
DEX: 13 (+1)
CON: 15 (+2)
INT: 14 (+2)
WIS: 15 (+2)
CHA: 16 (+3)

Skills: Deception +7, Insight +4, Stealth +3
Senses: darkvision 60 ft., passive Perception 12
Languages: Abyssal, Common
Challenge: 4 (1,100 XP)
Proficiency Bonus: +2

Innate Spellcasting. The lamia's innate spellcasting ability is Charisma (spell save DC 13). It can innately cast the following spells, requiring no material components.

At will: disguise self (any humanoid form), major image
3/day each: charm person, mirror image, scrying, suggestion
1/day: geas

Actions

Multiattack. The lamia makes two attacks: one with its claws and one with its dagger or Intoxicating Touch.

Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 14 (2d10 + 3) slashing damage.

Dagger. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage.

Intoxicating Touch. Melee Spell Attack: +5 to hit, reach 5 ft., one creature. Hit: The target is magically cursed for 1 hour. Until the curse ends, the target has disadvantage on Wisdom saving throws and all ability checks.

How many for your party

Copies of the lamia (1,100 XP each) against a party of four characters of the same level. Build mixed fights in the encounter builder.

Number of Lamia for each difficulty, party of four
Party level	Easy	Medium	Hard	Deadly
Level 3	—	—	1	2–20
Level 4	—	1	—	2–20
Level 5	1	—	2	3–20
Level 6	—	2	—	3–20
Level 7	—	2	3	4–20
Level 8	2	—	3	4–20

Questions

What CR is the Lamia?

The Lamia is challenge 4, worth 1,100 XP, with a proficiency bonus of +2.

How many hit points does the Lamia have?

97 hit points (13d10+26), with AC 13 from natural armor.

How many should I use against four 3rd-level characters?

Against four level 3 characters, 1 is hard by the encounter XP budget.