Problematic notion about Zone 5 & 6 story bits.

[17cupsofcoffee]

Thanks for the information!
Though I'm still even more puzzled as to why it's so special you can't find it anywhere else, when we can create clones, summon living beings and that puppet who stole aether from a corpse left that corpse behind. Voidsent replenish their body aether by consuming other aether directly, like when Zero just turns that apple to aether.

I think it's less that the aether is special, and more the sheer amount of it that Sphene wanted/needed. Aether can't be created from nothing - when someone casts a spell or summons something, they're either using up their own aether (which makes them tired/hungry) or the aether of the surrounding environment (which messes up said environment if done to excess, as see in the Sixth Umbral Calamity). When they consume food (whether it's in the normal way or... whatever the heck Zero does), they're taking the aether of that food to replenish theirs.

It seems like Living Memory has hit the point where it demands more aether than the natural cycle can provide (probably not helped by the fact that the entire living population of Alexandria got teleported into the Source), and so the only way to keep things running is to get more from somewhere else.