feat

We can see that light. Those of us within the Empire of the Eye can actually see it. The Astronomican reaches even to our purgatorial exile, and to us it is no mere mystical radiance illuminating the warp. It is pain, it is fire, and it plunges entire Neverborn worlds into war. It would be a mistake to believe the Emperor’s power battles the Four Gods’ forces, here. It is not order against chaos, nor anything as crude as ‘good’ against ‘evil’. It is all psychic energy, crashing together in volatile torment. (p. 335)
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Most of the Radiant Worlds are uninhabitable, lost in the lethal crash of conflicting psychic energies. Armies of fire angels and flame-wrought projections wage war against everything in their path. We call this region the Firetide. What made the Avernus Breach so valuable was its path, not its destination. It cut through the systems forever bleached bare of life by the Firetide, and into the calmer Radiant Worlds beyond. These are the star systems bathed in psychic light without burning in it. (p. 336)
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We passed worlds burned clean of life even down to the molecular level, annihilated when the Eye of Terror first opened. We passed worlds with oceans of boiling liquid gold or clouds of impossible fire-vapour. We passed worlds where civilisations of blind things sensed our passing and shrieked at the ship with ten million weakly psychic voices. We passed worlds where the ghosts of dead eldar waged eternal war against what few daemons manifested in the Radiant Worlds, as well as against spirits that resembled men, women and Space Marines twisted almost beyond recognition. Every planet was bleached in the manifest light of the Astronomican as well as suffering the oppressive touch of the Great Eye. (p. 348)