WyrmHero wrote:For the pyromancies, they work with some kind of meditation with nature. Pyromancy was invented when the Witch of Izalith created the Chaos Flame. I have read that Chaos Spells does not depend on how much Humanity you have, however, Chaos feeds on Humanity, so the most logical theory is that Chaos Spells are stronger the more Humanity you have.The power of these pyromancies depend too on how powerful is your Pyromancy Flame. For the Sorceries, even the sorcerers dont know how they do it. It seems that theres a connection with the power of the souls and the crystals.
I will have to contest with your thoughts on the Chaos Pyromancies, because the mechanics themselves do not support it. Chaos Pyromancies do not gain power with stored humanity like the rest, the only difference between them and the regualr versions being that they leave lava behind when used. I will throw out the idea that the difference between them, lore-wise, is that normal pyromancies draw on the power of the First Flame, while Chaos pyromancies draw power from the Chaos Flame. Since the power of the First Flame permeates the entire world of Lordran (as evidenced by the embers that fall through the air), I feel this is safe to assume. Both spells are the same kind of spell and the same in power since the caster is still channelling the same amount of energy into the same form, but one has different effects because it comes from a different source.
As for sorceries, I don't believe the crystals have anything to do with them. I'm pulling alot of "proof" from Demon's Souls for this bit, but I feel it all translates very well into Dark Souls as well, though because of this take what I say about sorceries more as specualtion. Anyway, sorceries are the polar opposite of miracles. While miracles use one's understanding of an outside source, and drawing on power from said outside source, sorceries draw upon on an individual's understanding of themselves, and drawing on inner strength for their power.The reliance on intelligence for sorceries follows the same vein as miracles. The scroll for a sorcery lays out instructions on how to channel your energy into a tangible form, and your intelligence allows you to be able to understand those instructions. This even ties in to the idea of increasing soul levels to use higher level magic, as the higher levels of magic require more individual energy to draw from. The crystals only relate to a very specific form of magic that Seath was researching, combining inner power with a source of natural energy for enhanced strength.