The assassin known as Shard has been the bane of imperial forces in the sector for decades, his covert operations disrupting everything from ammunition production all the way up to large scale troop deployments to the campaign against an Ork incursion along the Eastern Frontier. Shards needle rifle has taken the lives of both crime lords and admirals, what is seemingly a random pattern of murder has far reaching implications; the assassination of an arbites marshall for example, allowed the flourishing of a hidden slaaneshi cult hidden within the aristocracy of the spire of one of the systems major hives, eventually leading to a demonic incursion that required inquisitorial intervention, pulling vital military resources from the frontline of the greenskins campaign. The resulting ork breakthrough has enveloped three more planets, including one that contains an ancient eldar warp gate, the infiltration of which is Shards ultimate mission.
Should Shard enter the webway, he intends to use his lethal skills to hunt the eldar through their own territory, in an attempt to disrupt the sensitive psychic network to allow his masters servants to finally finish what the eldar themselves started.
With the removal of the imperial presence from the planet, Shard now intends to venture to the supposed site of the portal and begin his endgame. However, while the chaos of an ork occupation is ample cover, it also raises the issue of tens of thousands of orks on the rampage, and as good as he is, even Shard knows he wouldn't last long against an entire warband alone.
And this is how Shard has come into the company of "The Gentle" and his reavers, hoping to harness the combat prowess of his new allies as the perfect distraction to allow his mission to continue. Although he and the Gentle share the worship of their God, the renegade is nothing more to Shard than another weapon in his arsenal, to use and discard as he sees fit..