Legacy of the House of Haarlock.
“It is a beast that swallows the apostate, the doubter, and all who ship with them. Better to slay the unfaithful than risk the dread Maw whilst such false wretches draw breath.”
The Koronus Passage is a stable but dangerous warp route that passes through the Great Warp Storms separating the Calixis Sector from the Koronus Expanse. The Koronus Passage was discovered by a Magos-Explorator of the Machine Cult in the distant past, lost for millennia, and found once more by the Rogue Trader Purity Lathimon at the very close of the 40th Millennium. The Passage links Port Wander and the Drusus Marches to the great star Furibundus and the void colony of Footfall—and beyond Footfall, the Koronus Expanse beckons.