Board Thread:Warhammer 40k General Discussion/@comment-7186329-20130329164207/@comment-6078851-20150507154002

the biovore article doesn't actually say that it is the result of the orkoid genome, it says that imperial savants 'believe' it's the result of the orkoid genome. the biovore entry in the current tyranid codex is almost word-for-word the same as this wiki's biovore article, with the exception that the codex doesn't mention the bit about what imperial savants believe, and what folks believe isn't necessarily fact - it might be fact but that article doesn't explicitly say so.

currently the shadow in the warp is no threat to the chaos gods. it's a threat to daemons and little or temporary warp rifts as the muffling effect stifles the conduit of warp energy (providing there are enough tyranids in a vicinity for the shadow to come into effect), effectively nullifying chaos (as evidenced by the fall of shadowbrink). as for the 'fully awake' hive mind exuding a potent enough shadow to threaten the gods, well... that's just an extrapolated theory - it's a theory i wholeheartedly subscribe to, but we won't know the exact force the shadow in the warp will have until the hive mind is fully awake.