Skulk

AC: 14

Initiative: +4 (14)

HP: 18 (4d8)

Speed: 30 ft.

Saving Throws: Con +2

Skills: Stealth +8

Condition Immunities: blinded

Senses: darkvision 120 ft., Passive Perception 8

Languages: understands Common but can't speak

CR: 1/2 (XP 100; PB +2)

Fallible Invisibility.

The skulk is invisible. This invisibility can be circumvented by three things:

Charnel Candles.
The skulk appears as a dim, translucent form in the light of a candle made of fat rendered from a corpse whose identity is unknown.
Children.
Humanoid children, aged 10 and under, can see through this invisibility.
Reflective Surfaces.
The skulk appears as a drab, smooth-skinned biped if its reflection can be seen in a mirror or on another surface.

Trackless.

The skulk leaves no tracks to indicate where it has been or where it's headed.

Actions

Claw.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) slashing damage plus 3 (1d6) necrotic damage.