Board Thread:Warhammer 40k General Discussion/@comment-6078851-20130318203252/@comment-3258762-20130401160632

Well, the problem is, the Emperor told Horus, at least, of what was in the warp. Not necessarily about the gods, but he definately told Horus that there were creatures of immense power there.

In Horus Rising, i believe it was, Horus talks to Loken after Loken has had his first battle with a Daemon, where he describes to him that there are creatures not like any other in the material world, who bow down to an immensely powerful master, and that the name Daemon can be used to describe them, but that they are in no way invincible, and that when you face these "Daemons" you shall always trust your blade and never doubt that they will fall before you.