User blog comment:DirgeOfCerberus111/Adeptus Custodes Vs. Grey Knights/@comment-1932673-20111028201629/@comment-2253300-20111028203006

Okay, you guys need to stop with this whole the Grey Knights only fight Daemons tangent. The grey Knights are perfectly well trained and equipped to deal with any enemy they deal with. They are the strongest Astartes in existence. It isn't that they only fight Daemons, it is that they are the only ones that truly can combat the full force of the Chaotic threat, something no other force, the Custodes included could do.