User blog comment:Trulyrandom/Heresy AT/@comment-3341288-20111121185112/@comment-2253300-20111121214902

If you recall that Webway gate was wrecked before Horus even got to Terra. Now as far as why he would allow the Emperor to live, I say gloating. Something like "You think I will allow you the release of death? Oh no father. You will live to see me bring down everything you have wrought." Something like that, and then he tosses him in a prison.