Imposing and cursed, or so the stories say-the Rifts of Hecaton are the Rimward border of the Koronus Expanse. Supposedly the rifts have devour Magos Hecaton of the Thulian Explorators, the Rogue Trader and Inquisitor Lord Kobras Aquairre, and a handful more foolish explorers. The roiling void of the Rifts are deadly and unpredictable, but many have evidence that they are not completely fatal. For many decades, seasoned voidfarers claimed the Void Krakens made their homes within the Rifts, and recent evidence suggests the Rak'Gols have passed through the Rifts from the other side to emerge within the Accursed Demesne.
Most recently, however, rumors have spread that the Rogue Trader Magnus Ulrik Tröile passed through the Rifts to discover an unknown species of xeno living beside humans as well as Orks, Dark Eldar, and Rak'Gol. This journey has yet to be repeated by any Imperial citizen, including Tröile himself.