Rumble—
As muffled thunder rolled from within the thick clouds,
torrents of icy rain suddenly descended upon the dense rainforests of the homeworld, Xavius.
Countless raindrops falling from broad leaves continuously splashed across the massive bodies of Chaos Astartes marching forward in silence on mag-boots.
Streams of crystal-clear water ran again and again through the seams and grooves of their plasteel casing, flowing down into the muddy ground.
They were then swiftly crushed beneath metal treads, along with the surrounding vegetation and trees, by heavy vehicles slowly advancing onward.
At this moment, the first wave of thousands of Chaos Astartes and an even greater number of heavy vehicles emerged from the rain-shrouded depths of the rainforest, their towering forms utterly terrifying.
Ranks of Iron Warriors carrying heavy boarding shields marched onward in an extremely tight assault formation, their movements so synchronized they were almost as one.
Meanwhile, the World Eaters of the Skull Taker Warband and the Chaos Astartes of the Soul Maw Warband gripped their assorted daemon weapons tightly, following behind the massive steel phalanx in utterly disorderly formations.
Boom boom boom—
In an instant, as invisible orders were issued,
dozens of even larger Living Artillery Constructs, the Annihilators, began to move their heavy steps.
They raised the living cannon barrels growing from their enormous bodies.
They continuously directed more heavy vehicles to unleash a massive artillery barrage upon the Metal Fortress zone ahead!
As countless shells landed with terrifying shrieks, instantly turning many Metal Fortresses into flying wreckage,
the awakened Thinker arrays and servitors also began operating their firepower defense platforms, launching a powerful counterattack!
At that moment, there were no unnecessary sounds.
There was only the ceaseless roar of explosions as artillery met artillery.
And so, the opening act of this war of vengeance between Primarchs began.