At some point in his fluff Huron Blackheart decides or plans to sacrifice the whole population of a planet (going from the piece of fluff it consists out of some billion ppl).
Now given that Huron isnt aligned to any of the big four, I have been wondering what happens in the warp if you make undedicated/undivided mass sacrifices? I mean the Word Bearers seem to do that all the time. And I guess who ever is responsible for the sacrifices gains much favour from all warp entities?