Mimic Speech. The Skin-Stealer can mimic human speech but doesn't understand it so it mostly says random phrases it hear before to attempt to lure in prey. A successful wisdom (insight) check DC:18 reveals the falsehood of its voice

Clear Blood. One of the most identifying trait of a Skin-Stealer is its translucent blood

Skin Stealing. If a skin stealer successfully kills a humanoid and already isn't disguised they can spend a total of 5 minutes removing the flesh of their victim and using it to disguise themselves as almost perfect copy's of the deceased for 24 hours when they then absorb the skin.

Rip. The Skin-Stealer attempts to grab and rip chunks off an humanoid with a dexterity or strength save DC:15 on fail they lose 1/8th of their maximum hit points

Strike. Melee Weapon Attack: +4 to hit, reach 5 ft., 1 target. Hit: #10 (2d4 + 2) bludgeoning damage.