Here again. In lieu of any actual writefaggery, I have decided to have a go myself. Here's the introduction, more to come!
Cadia, the bastion-world at the very gates of Hell...
For ten milennia, the planet, and it’s inhabitants, had stood vigil over the Eye of Terror. All that lay between the unfathomable madness of the dark gods and the flickering candle of humanity a scant few million troops. They knew their task – to deny this most precious of prizes from the Great Enemy, the Destroyer s of sanity... the forces of the mad Chaos Gods. They also knew that it had been this way since the defeat of the treacherous Warmaster, Horus, when he had been slain and his forces had been pursued into the Eye by the victorious defenders of humanity. What they didn’t know, however , was the secret grate hidden in the depths of the largest, most fortified dungeon on the planet.
They had no idea that, in the aftermath of the Despoiler’s 13th Black Crusade, the seal on the dread portal had been cracked open by the impact of artillary shells against that very dungeon...
A gauntleted fist, clad in the black armour of a champion, nay, a scion of chaos cautiously swings the portal outward and tastes the stale air of liberty.
“At long last, after ten thousand years... I am free!”