ok a succesor chapter of the white scars (i don't have a name yet, and advice would be appreiciated) is stationed at their fortress world of Belisarius IV and in the isolation the Prince of Chaos whispered to them a dark proposition, in return for their service Slaanesh would award them with speed unparalelled.

the veteran marines were repulsed at the very notion, but theyounger marines were seduced by the promises of the Decadent One and killed their battle-brothers who rebelled

so now they ravage the galaxy in lightning raids, conducted with surgical precision, so that their enemies have no chance of survival.

so any suggestions? does anyone think they should be traitor Ravenwing, like the Fallen?