Wait a minute...is this a plot-hole (Austerities of Wind and Main Scenario-related)?

[Kaiser-Ace]

Wait, can you tell tell me where we learn this? I thought we summoned an Egi simply because it's controllable, just the pure essence of the primal so that it takes a manifestation of it, albeit smaller, and doesn't have the personality most primals have?

The Conjuror Questline states if you use more aether than you have it will kill you.

Thaumaturge quest line implies the same is true in Thaumaturgy because it draws directly from one's own aether.

Summoning via the Allag Method is using a defeated primal's lingering essence and our own aether to make the aetheric construct know as an egi which is only a fraction of the true primals power.

The fact that it takes a dozen to several hundred worshipers to summon a prim depending on it's strength via the ascian method which is funneling the worship (read aethier) of the subjects into a large crystal.

So considering how much it takes to summon just the normal primals it would easily drain us to death several times over. So the Allag method uses a line person's aethir for an egi but the ascian method dodges that risk by using a crystal to channel energy from multiple followers for the summoning.

Now let's say some other adventurers tossed you some aethier (aka limit break) and you could possibly summon the full primal for just long enough to fire its supper attack a dissipate.