Board Thread:Warhammer 40k General Discussion/@comment-7186329-20130329201743/@comment-6078851-20130405024848

to add to this^^,

most of the worlds where chaos astartes dwell are daemon worlds but these worlds still reside in the material realm. most of these worlds are in the eye of terror although the eye isn't warp space but an area of realspace where the warp has the greatest influence, and the very centre is the gateway to the warp realm.

the tyranids could attack, and probably wipe out, any worlds in the eye's sphere of influence but any attempt to pass through the gateway is suicide.