Kophyr

Kophyr is a planet of the Imperium on which Saint Celestine led Astra Militarum forces against War Engine, the leader of a blood cult of Khorne that had taken control of the world. No segmentum, system, or galactic coordinates are firmly recorded for it, and little is known of its population or economy.

The campaign is placed after the opening of the Great Rift. Celestine’s forces overcame the cult, but an Inquisitor who had fallen under Khorne’s sway turned half of the Guardsmen against her; the mutiny was defeated, and Celestine was killed at close range by a melta shot.