Noppera-bo

A Noppera-bo first appears as an ordinary traveler, innkeeper, friend, or frightened stranger. Only when trust or concern draws someone close does every feature vanish, leaving a smooth blank face. It feeds on shock instead of flesh and often repeats the trick through several borrowed identities, making the victim doubt whether any familiar face is real.

Borrowed Familiarity: one creature within 20 ft makes a Mind save. On a failure, it cannot willingly attack the Noppera-bo for 1 round and suffers 1d6 psychic damage when the face disappears.

Name Before Face: asking a question only the imitated person could answer gives +2 to the save. A mirror reveals the blank face immediately and prevents Borrowed Familiarity.