Tyranids - Splinter Fleet
From the cold darkness of the void comes a race of ravenous aliens, a numberless horde governed only by the instincts to hunt, kill and feed. Each Tyranid is a living weapon, perfectly adapted to its designated function, but each creature is no more than a single cell in a galactic entity governed by a monstrous Hive Mind. As the Tyranid hive fleets drift through space they strip all life from the worlds in their path, leaving nothing but scoured rock in their wake.