Behold, the Armies of War Descend Screaming from the Heavens!

During the ninth millennium of the Neo-Atlantean Calendar (3590 AD by the old reckoning), the fiends of Z'xulth were liberated from their infernal prison via the traitorous machinations of their dark agents and acolytes. The Great Chaos War thus began, and red havoc was wrought across the cosmos. Man's clarion call to battle was heralded by the Third Adulation of Zakumakura, and the final blessings of guardianship being bestowed upon a mortal destined to assume the mantle of Sentinel Omega...
The Disciples of Zakumakura: Since before mankind hurled himself squamously from the sea we have awaited the final awakening of great Zakumakura, the Abyssal Worm who slumbers far, far beneath the fathomless oceans! Prophecy speaks of the Three Adulations of the Abyssal Worm; the first soon after His glorious genesis, the second when His fury was directed against Atlantis, and now... the Dragon-King shall at last rise, an instrument wielded by the servitors of the Z'xulth! Cast your gaze to the firmament and know fear, for the forces of Chaos fill the sky! Behold, the armies of war descend screaming from the heavens! The Great Chaos War begins!
The New Order of Kl'aa: Treachery! Betrayal! The Praxeum's fallen revenant unfetters the forces of evil... the Hound of Z'xulth too is liberated! Hearken servitors of Chaos, your legions will fall as wheat before the harvest blade. The long aeons of tyranny are at an end... now, let the Ninth Millennium begin. The guardians of Order have assembled!
The Servitors of the Z'xulth: The Ritual of Ascendency is complete. Now is the time for trenchant steel and the massed throng of battle! Cry havoc! Crush them, kill them, destroy them all!
The Invocation of Zakumakura: Kaiju, Dragos, Gojira! Kaiju, Dragos, Gojira!
The Disciples of Zakumakura: You have lost the game, myrmidons of Mera and Kl'aa! Your attempts to thwart our will have come to naught! You are guilty of dire crimes against the Z'xulth and the Terran Imperium! The charge is high treason against the empire... you will bear this punishment with praise on your lips! Behold the splendour of the Abyssal Worm... behold Great Zakumakura!
The Invocation of Zakumakura: Zakumakura Es-iaah! Zakumakura As-aaoh!
The Techno-Mages of Telluria: High treason against the First Tellurian Interstellar Empire? Such base duplicity! You and your dark acolytes seek to bring down the imperium, not safeguard it! Bah! A thousand curses upon the coils of Zakumakura! A genetic experiment gone awry, bolstered by sorcery and the energy of untold millions of fettered atoms! There is a countermeasure against your reckless abuse of power! The might of Sentinel Omega shall be brought to bear against you!
The Disciples of Zakumakura: Invoke the Dragon-King... and let the great serpent rise to devour the world of men! Hearken... He rises, He rises at last! Behold the celestial majesty of Great Zakumakura! We are all entwined within the coils of the great galactic worm!
The Aspirant to Sentinel Omega's power: Dire cataclysm befalls the orb azure! Elemental disarray... chaos beyond the Tellurian cloudscape! The galaxy burns! I am the receptacle of the ultimate power... the power of Sentinel Omega... I am the vessel of his greatness! I am the One! Chosen to weild this power of the Ersatz Ones! I am the first, and the last sentient lifeform to embrace the might of these unstable molecules! I shall ride the crest of this reverse-engineered wave of grandeur! It is time the Sentinel's mettle was tested!
The Disciples of Zakumakura: The galaxy is their battleground... the stars are their arena! Let mankind despair in the knowledge that this day did see an end to his insignificant dominion... and the birth of a new era of glory for the servitors of the Z'xulth!
Sentinel Omega: I feel it... the omniverse exists within me! Every molecule in my body is ablaze with cosmic fire! I have forsaken my humanity forever... I, who now walk with the gods amongst the endless stars!
And as the fires of the Great Chaos War guttered and died, as the century of conflict drew to a close, so the universe witnessed a tenuous new age of enlightenment. It was said that upon mankind's final evolution and long awaited ascent to a level of non-corporeal existence, beginning at last to wield that power once exclusively the domain of his ancient progenitors, the Elder Races of the universe would begin their long retreat into the ageless shadows, as their predecessors had once done, so long ago. These Elder Races would themselves evolve, finally aspiring to realms of enlightenment hitherto accessible only to mysterious and unfathomable beings which they themselves revered as gods. And yet the Z'xulth wait, ever hungry, ever vengeful, ever poised to reclaim their cosmic thrones and once more reign unopposed as true masters of creation. For the ancient prophecies speak of that dark day when the chaosphere shall be once more ascendant, and the malefic They-Who-Lurk-And-Breed-In-Limbo shall once again stalk the shuddering stars...