Starfinder RPG: Horizons Of The Vast 6 Of 6 - The Culling Shadow

"The Culling Shadow" is a Starfinder Roleplaying Game adventure for four 11th-level characters. This adventure concludes the Horizons of the Vast Adventure Path, a six-part, bimonthly campaign in which the heroes are at the forefront of exploring and charting a world filled with mystery. This volume also includes advice on continuing to administer the charter through new challenges, a study of the Negative Energy Plane, and a selection of spooky alien threats.

Soft cover.  Paizo