The Slannesh-tainted Hive Splinter

You're a guardsman who's been separated from your battle group. A Tyranid splinter fleet has been giving this world hell for the past week, and you're fearful for your life. Little do you know, this hive fleet has somehow accepted the 'gifts' of Slaanesh, though only specimens of the fleet with higher intelligence exhibit these new traits. As you shakily scramble behind a barricade, trying to reload your las-rifle, the chittering and growl of the xenos invaders grows near...