Board Thread:Destiny Forum/@comment-28094273-20160501031320/@comment-25916964-20160502071228

You have to keep in mind that they why in which the Hive reproduce is an unknown. Plus there is that symbiotic relationship with the worm going on... so there is almost definitely something to do with the darkness going on there. I'll see about getting the rest of the Grimoire Cards up (I've procrastinated it enough), there might be something in there to clear things up.

As for the quote from Last Rites, I don't recall hearing that, nor is it in the article's transcript. Always possible a rune has been missed though.