Board Thread:Warhammer 40k General Discussion/@comment-95.148.187.34-20130120214333/@comment-3258762-20130308190914

There were no eldar, humans or the like before the Old Ones, though. The Old Ones created most psychically attuned creatures in the galaxy.

It would make little sense if magic is completely safe in 40k since, if they can use the warp, there is still a chance of shit going further south than Australia, yet this never happens at all. Either you can use warp power and allow the risk of shit going south or you can't use warp powers, one of the major things about 40k is the danger inherent in any psychic power.