The other familiar fundamental force is gravity, and this belongs to Yevassë. She took charge of it simply because it is the force that pulls matter together, acts over long distances, and proceeds steadily most of the time. Rather more suited to her temperament, steady, and conceptually aligned with her aims, to keep things together. Although of course, gravity can also be used as a great force of propulsion. Ällora went with electromagnetism because it was the easiest to explore new possibilities with, and the most dynamic, in his conception of its uses.
To begin with, a simple application of gravitational magic would be to lift objects, which would strike mages as very similar to the magnetic use of the electromagnetic force. True, but I would suppose that gravitational negation would allow simple lifting of all objects, but magnetic levitation would work best with paramagnetic materials. Diamagnetic materials should require quite a lot more power to work with.
While a user of electromagnetic magics would be able to sense distortions in electromagnetic fields, a user of gravity would be able to sense the movement of mass of any sort. A gravity mage would sense a moving projectile, the location of the sun and so on.
As a whole, gravity is not a force that I would say acts very variably on human scales, but I have been able to think of interesting possibilities that may require a sizable magnitude of power. I'm not really sure how much I should limit these magics but here goes :
Increased agility by reducing the effect of gravity on the body. This would allow jumps and acrobatic feats which are not normally possible. Since water is diamagnetic, this effect would remain largely exclusive to mages aligned with gravity. Conversely, an opponent's freedom of movement could be greatly suppressed.
Gravity could also be used to accelerate objects easily, and presumably, an extremely fine degree of control would result. The patterns that result from simple gravitational laws are intricately complex. In combination with a mage's sensitivity to moving objects, this may allow for precisely orchestrated manoeuvers. Gravitational fields of objects in the environment, or even the air, could be used to pull other objects around, by strengthening or weakening local gravity. The ability of a mage to channel gravitational field strength should be related to the mass of the original object. It would take a lot more to increase the gravity around a bubble of soap compared to a lead sphere.
Another interesting application of gravity would be how it interacts with spacetime. Or in rather more confusing synonymous view, matter stretches spacetime which causes gravitational effects. Or I might want to wait for the graviton. Anyway, this could be exploited to manipulate light. Rather ironically, this would lead to a lot of confusion about the nature of magic as a whole, to those unaware of the underlying systems. Cloaking devices are therefore, possible with both gravity and electromagnetism. Light cannot, however, be generated directly via gravity. Then again, a gravity mage would not require such optical aid for illumination, their sensitivity to mass and movement would suffice.
Pushed to an extreme, gravity is responsible for black holes, though such a massive, no pun intended, undertaking would have to be fatal for a few gravity mages in concert. The amount of energy required to form such a dense object would be beyond human manipulation. Not to mention the disastrous aftereffects.
Well that's about it for gravity for now, a general feel of this discipline of magic. Some of its effects overlap with the electromagnetic expression of magic, but other effects do distinguish its basis on a separate interaction.
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