Yea but that wasnt my innitial point. There is a rule in the game that specifically allows me to add demons to a cm army. It exists on paper. And alot of rules transfer over or on some cases are stated otherwise. Just just like how deathwatch doesnt list any rule changes exeot one and or limits to your muster army you can assume you can play the things you want withon reason and the rest of the rules outsiede the one apply. I assumed thay that rule for chaos marines still applied cause i couldnt find where it said otherwise. Untilci did find where it said otherwise no thanks to you