Lamia

Large Fiend, Chaotic Evil

AC 13 Initiative +1 (11)
HP 97 (13d10 + 26)
Speed 40 ft.

Skills Deception +7, Insight +4, Stealth +5
Senses Darkvision 60 ft.; Passive Perception 12
Languages Abyssal, Common
CR 4 (XP 1,100; PB +2)

Actions

Multiattack. The lamia makes two Claw attacks. It can replace one attack with a use of Corrupting Touch.

Claw. Melee Attack Roll: +5, reach 5 ft. Hit: 7 (1d8 + 3) Slashing damage plus 7 (2d6) Psychic damage.

Corrupting Touch. Wisdom Saving Throw: DC 13, one creature the lamia can see within 5 feet. Failure: 13 (3d8) Psychic damage, and the target is cursed for 1 hour. Until the curse ends, the target has the Charmed and Poisoned conditions.

Spellcasting. The lamia casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 13):
 At Will: Disguise Self (can appear as a Large or Medium biped), Minor Illusion
 1/Day Each: Geas, Major Image, Scrying

Bonus Actions

Leap. The lamia jumps up to 30 feet by spending 10 feet of movement.