Kasr Holn

Kasr Holn is the fifth world of the Cadian System, a sister fortress to Cadia rather than a city-kasr on Cadia's crust. The 13th Black Crusade wrecked it with warp-craft and daemons; a Hawkshroud knight died buying the evacuation. Later sources still call it a mutated Imperial holdout, which is as close to good news as the Gate gets.