Board Thread:Warhammer 40k General Discussion/@comment-24180680-20140312145854/@comment-6078851-20140415142134

exceptionally unlikely, but webway breaches have occured before so it is possible.

although i'd also like to point out, and i'm surprised no-one's mentioned this yet - psykers in commoragh!?! in the realm where every evil under the black-suns is not only permissible, but wholeheartedly endorsed and enjoyed, there is one thing that's forbidden - the use of psychic powers. this is the single thing that the denizens of commoragh are geared to prevent, and they have ample technology with which to prevent it. so while it's feasible for a psyker to invade and wreak a little havok (like du'un or sindri), it's completely unfeasible for the warte to have been doing what he has been - he's supposedly been to commoragh a lot, except that on his very 1st visit he would've been killed out-of-hand simply for being psychic and in commoragh.