Ehhh it IS, but...I like that thought, but boosting magic is astral territory. Though an astral materium tome could focus on something like that. Combining the understanding of astral with a plan/construct to make it easier to use
In the aow cosmos the source of magic is the astral sea. Where it pierces into the material worlds we find mana crystals.
Cutting the connection to the astral sea (by for example using the seals, which led to aow3) will prevent mana from entering. Controlling the seals, according to the victory screen, gives you full control over the magic on the realm and allows you to eject all other godir.
keh. Getting changes made like that might get me skinned alive, even if i were to succeed. I don't care about internal coherence nearly as much as other people care about theirs. : P
You mentioned something. Mana crystals. Are there magical 'creatures' that feed on mana crystals, but are not astral spirits? Might be a lead, there.
Short of some kind of clockwork god, though, with clockwork angels, i don't think we'll be getting materium based concept id.