The Dark Elder raid everywhere, and bringing back a Tyranid for entertainment is sure to get them recognition. The fun part is bringing back a large enough Tyranid, without being eaten in the process.
A stunning peace of art right here, never would have expected the Tyranids (who wage all out invasions on an inter-planetary scale with endless tides of cannon-fodder) to battle with the Dark Eldar (which launch several surgical strikes at the heart of the enemy, disappearing as fast as they came). Both factions present a nightmarish image in a different way, but once they clash, a whole new nightmare appears. I like this image lots, splendid job.