Board Thread:Warhammer 40k General Discussion/@comment-25507520-20150422230011/@comment-6078851-20150508152732

why not? it's essentially the same process, the big differences being that the eldar havn't committed mass suicide and that eldar souls are being actively hunted by a chaos god.

when the shaman suicided their souls weren't being actively sought by a chaos god, allowing time for their collective souls to gather into a single entity, plus they all died at pretty much the same time - increasing the potency of the act and reducing the amount of time between all their deaths and the creation of a new 'supersoul'. since the eldar aren't all dying at once and their souls are being relentlessly preyed upon, they need spirit stones to hold onto their souls until such a time when they are all (or nearly all) dead, and can then infuse a new being with life.

emps is the collective soul of all the psychic humans of that time. eldar (all of them) are way more psychic than humans and the creation of ynnead will be using, not just the eldar of this era but almost every eldar of the last 20,000ish years. at the very least ynnead has the potential to be the equivalent of emps for the eldar, except that because of the psychic nature of the eldar he/she/it has the potential to be far more powerful than emps. and if emps can cause grief to the chaos gods on his own, then the birthing of ynnead could spell the actual downfall of them. and while eldar and human don't really get on i could see emps and ynnead being on good terms - good enough to tag-up against the gods :)