The Tyranids surge forward in a living tide, chitin and claw crashing across the battlefield as monstrous bioforms roar and swarms of lesser creatures flood every inch of ground, driven by the endless hunger of the Hive Mind. Standing firm against the oncoming swarm, the Ultramarines answer with disciplined fury - bolt rifles thundering and cerulean-armoured warriors holding the line with unwavering resolve as the sons of Guilliman fight to halt the devouring shadow.