Ok, I'll PM you the result. Wait, I'll just add it here:
The heavy fog threatened to obscure the enemy from them as they waited. They stood in unnatural stillness, bolters poised, awaiting the enemy. Row after row of Grey Knights, tained to gleaming perfection, stood waiting for a charge that might never come. Suddenly, from out of nowhere, a roar like that of an injured beast erupted from the fog. Before, behind, to either side, it was impossible to tell where it was coming from. This soon became a moot point, however, as its location was obvious from the bolts of lightning sizzling through the air. One Space Marine, a courageous defender of the Emperor, fell to this barrage, byt the others readied their weapons. And then Chaos was on them.
"Blood for the Blood God!" cried Zenith. His Traitor Legions of Space Marines charged, spilling over the enemy like a wave. His Rhino, almost unrecognizable for what it was after its mutation, barreled into the enemy lines and scattered them like insects. He maniacally charged headlong into a Space Marine squad, laughing insanely as his axe clove through one Space Marine like a chainfist through a Termagant. The Marine gurgled as he went down, and one of his companions swung around, firing his bolter at the Chaos Lord. Zenith ignored the rounds, swinging his power fist around and grabbing the marine by the throat. The thumb of the power fist punched through armor and the soft flesh of the Marine's neck, and Zenith tossed him aside like a rag doll. He continued his headlog rush, tearing into everything within arms reach. A faint glimmer in his slaughter-addled mind directed him toward the Devestators, troops bearing massive Lascannons which could pose a threat to his troops. He ended the threat in an orgy of slaughter, bisecting one Marine even as he broke anothers skull with an almost casual flick of the wrist.
Across the battlefield, his troops were doing almost as well. With cries like "Skulls for the Throne!" they charged into their enemies, ripping them apart with twisted chainswords, axes, power fists and bolters. A massive Grey Knight Land Raider ponderously swiveled, aiming its guns at the Chaos troops, but before it could fire, a laser bolt from a Lascannon punched through it, flipping the massive vehicle as a child might toss a toy. A huge Dreadnaught, a fighting machine powered by the spirit of an ancient warrior, closed with the Traitor Marines and began firing with its heavy weapons, taking down several of the dark troops. Many more pushed forward to fill the gap left by their fallen brothers, charging headlong at the armored Deradnaught. It was suicidal, but the Marines didn't care- they would get a glorious death in battle.
The Grey Knights, at first slow to respond, moved into action. With their gleaming silver armor and nemesis force weapons, they looked like their name suggested- knights of old, riding down the battlefield to slay the vile monsters. Their weapons made short work of the nearest unlucky Chaos Space Marine squad, tearing through their armor and ending the lives of the twisted souls inside. However, it was too little, too late. The onrushing tide of Chaos crashed against the shore, crushing what little resistance was left. As the sun burned away the fog, Zenith stood atop a mound of bodies, clutching the opposing commander's skull in his hand. He rose his arm to the heavens, and began a wild chant, which his brother Marines soon joined in:
"Blood for the Blood God! Blood for the Blood God! BLOOD FOR THE BLOOD GOD!"
The End