The sheet phantom and sheet ghoul appeared in the original first edition Fiend Folio (1981).

The son of Kyuss first appeared in the original first edition Fiend Folio (1981).

Cryonax first appeared with the elemental princes of evil in the original first edition Fiend Folio (1981), created by Lewis Pulsipher.

The black garbug and violet garbug first appeared in the original first edition Fiend Folio (1981).

The Styx devil (greater devil) first appeared under the "devil" heading in the original first edition Fiend Folio (1981).

The flind was introduced in the original first edition Fiend Folio (1981).

The mite appeared in the original first edition Fiend Folio (1981).

The eye of fear and flame first appeared in the original first edition Fiend Folio (1981).

The hound of ill omen first appeared in the original first edition Fiend Folio (1981).