Board Thread:Warhammer 40k General Discussion/@comment-24383134-20140105071847/@comment-74.128.152.190-20140112190024

Wasn't the only reason demons were swarming onto Terra was because Magnus broke the Psychic wards around the Imperial Webway when he tried to warn Emps about Horus?

Wouldn't Emps just be able to re-create those wards and mop up whatever gets through in the mean time?