Board Thread:Warhammer 40k General Discussion/@comment-117.192.179.237-20131224182556/@comment-3258762-20131226102526

Callummacdonald79 wrote: given how many different people create the fluff for 40k there's going to be a fair difference in how each creator views whatever it is their writing about (cough*mattward*cough). and given how dramatic some differences are, all we can try to do is find the middle ground that doesn't sound weak but is also not overpowered.

i'm not well read on the custodes but from what little i've gathered, and in my own opinion, primarchs should hesitate to take on one of the emperors hand created and hand picked bodyguards. i have no idea if they have any kind of active or passive psychic abilities, but in an unarmed (physical and psychic) encounter i reckon they should trounce grey knights. I would think that, due to their constant proximity to the Emperor, they gain a sort of auto-immunity to weaker psychic effects.