Hey guys, I probably missed this along the way, but I've gone back and read and can't come up with an answer on my own. I've read Thousands Sons, Prospero Burns, and plenty of GW material on the issue but I don't understand how the legions and especially the Space Wolves are seriously able to bring charges against Magnis and the K-Sons, what is the distinction they draw between their own librarians and the Sons? Like Wydmake claims there is this great distintion between sorcery and psyker stuff, how can he be serious? Can somebody help me here? Also, did the Death Guard not use Librarians at all?