Some series are NOT meant to be crossed over....
"WHAT WARP SPAWNED MADNESS IS THIS?" demanded Brother Maynard loudly as he stared at his newly transformed right hand. Before anyone could take notice of his suspicious outburst, he hastily blew off the hideous mutation with his bolter leaving a huge meaty bleeding stump in its place. "NO ONE MUST KNOW MY TERRIBLE SECRET" he boomed.
"WHAT SECRET IS THAT, BROTHER?" called out a nearby Astartes who was busy shooting at the sky and ground and posing for official Games Workshop artwork.
Maynard fumbled with his bolter, leaving genetically superior blood all over it. "UH...THAT MY HAND GOT SHOT OFF JUST NOW? WELL GEE I GUESS THE CAT IS OUT OF THE BAG." The other Space Marine gave him a jealous look. "IT KIND OF STINGS," he rumbled miserably.