Codex: Chaos Space Marines (2017), p25 — M40-M41 Age of Apotheosis

Abaddon the Despoiler's Thirteenth Black Crusade

The armies of Chaos invade Cadia and its many surrounding worlds. The forces of the Dark Gods read like a roll call from epic battles of the ages. Always in the vanguard are the Black Legion, followed by the Death Guard, World Eaters, Alpha Legion, Thousand Sons, Night Lords and other Legions from the annals of the blackest days. Renegade Chapters long thought extinct renew their assaults on the Imperium of Man. Before them run scabrous cultists, deranged mutants and traitorous scum in numbers too great to count. Behind them march Daemons of all the Ruinous Powers, the nightmares of mortals made real, led by their infernal overlords.

After a gruelling campaign with a death toll that spirals into the trillions, Abaddon the Despoiler succeeds in tearing down the strange pylons that for thousands of years had held the Cadian Gate as a stable region of space. Cadia falls soon thereafter, and a wave of warp storms roars into being across the length of the galaxy. Astropaths everywhere fear to open their minds to receive or broadcast messages, for the immaterium rings with mind-splitting peals, possibly the sound of the myriad tears ripping open in the barrier between the material universe and the warp, or perhaps the laughter of the Dark Gods...