The planet Eostra is a paradise portrait. A sublime oasis secreted away upon the fringes of Imperial space and largely isolated by unreliable warp currents. To its inhabitants it provides and easy life given to idle pursuits and revelry, detached from political meddling and the threat of war. Never the less, Eostra’s lustrous facade is not without its stains, and there is one which stands to resurface and consume its future.
Captain Jorais Valder of the Emperor’s Children has arrived in orbit aboard the grand cruiser Dirge of Malice under the guidance of the foul sorcerer Lebachus. His company are not typical warriors but noise marines, devotees of sonic excess and the minstrels of death and destruction. These are savage and ruthless fighters capable of tearing men to pieces and warping reality with the insanity of their twisted musics.
They come to Eostra seeking what the locals refer to as the world-harp, an ancient artifact of unholy origins. Though the playing of the harp now sustains life on the planet it was never intended as such. Centuries ago the instrument was fashioned by a cabal of crazed artisans, its impossible songs meant to draw in the fabric of the empyrean to envelop the planet and drag it from material space into the realm of chaos.
A number of vessels bearing Imperial Guard regiments bound for deployment elsewhere have been separated from the rest of their flotilla by the violent warp currents surrounding Eostra. They immediately head planetside at the first signs of the chaos attack to reinforce the megre defenses at the planetary capitol, Avalaun. This is unexpected but of no account to Valder, simply more blood to spill on the path to his prize.
Valder presses the attack in earnest, his forces split to assault the capitol from two sides. The ferocity of his noise marines along with the infernal magics of the sorcerer Lebachus visit ruin upon the Imperial troops. With only minimal losses they battle to the shrine of the world-harp in short order. Ever-increasing warp interference has all but cut off battlefield communications but Valder knows his men will do their job and proceeds with the rites to bring the world-harp back to its original purpose without pause.
After a brief while there is an urgent call outside the shrine and Valder returns to the tainted daylight to behold an unbelievable scene. The rain has picked up, thick and heavy now and Valder realizes with rising fury as he looks towards the south where his second strike force should be, it is not rain at all.
Mycetic spores fall from the sky in droves and where his men should have been advancing to the south he sees only an oncoming mass of indistinct forms. The Tyranids are upon them, utterly undetected until now amidst the disturbance of local warp activity.
Valder spits a curse and orders the remainder of his men to fall back in a defensive cordon. Let the alien filth come, he will take them to the warp with him. The infernal rites continue unabated, the contorting song of the harp struggling to rise above the chatter of chitinous limbs rushing up the stairs towards the shrine.