Battle for Vrykul

History
The Death Templars discover the feral world of Vrykul within the Segmentum Obscurus. They also encountered the foul xenos known as the Drukhari – specifically the Kabal of the Bloodied Blades – which had come to the human world to inflict pain and misery upon the humans, before eventually retreating to the Dark City of Commorragh with a screaming bounty of slaves clutched in their merciless grasp. The raiders' plans were foiled, however, as they didn’t count on facing an entire Chapter of Space Marines. Soon a bloody war ensued between the Death Templars and the Kabal.

Over time, the attrition of the Drukhari forces left the xenos little choice, but to flee or face annihilation. The Death Templars gave chase, haranguing the Dark Eldar across the Segmentum Obscurus, and chasing them into a Warp Gate that led into the Eldar Webway itself. Over many long months, the Death Templars relentlessly pursued their foes through the twisted pathways of the Webway, bringing them to battle, and slowly ravaged their forces through their use of brutal shock assault tactics.

In the end, it became too difficult for the Death Templars to keep up with their fleeing foes, as the Drukhari used their innate knowledge of the webway's hidden paths to outmanoeuvre their foes. In frustration, Lord Marshal Malik ordered his Death Templars to utilize heavy weapons and explosives to collapse a portion of the Webway, effectively blocking the Drukhari's path back to the Segmentum Obscurus. But this was merely a temporary solution, as the webway possessed more than one hidden gateway throughout the galaxy. The Death Templars knew that the Dark Eldar would return one day, and that when they did, they would finish what they had started.