An Omen in the Stars is a FREE one-shot adventure for Sandy Petersen’s Cthulhu Mythos for 5e. It can act as a curtain-raiser to the longer Ghoul Island campaign or be played as part of any ongoing fantasy-based Mythos game.
It is intended for a party of four 1st-2nd level characters — several pre-generated characters are provided in the adventure’s appendix.
“Three nights ago, a burst of light erupted in the sky over Ashlund’s Folly observatory. Since then, no one has seen or heard from old Ashlund, the caretaker. What transpired at the observatory that night and what became of Ashlund? The characters climb the Slopes of Kaza to discover the answers, only to confront enemies they never knew existed and face alien creatures from beyond the stars.”