My ideas on magic in a realistic fashion, this is a brief overview of a conversation with a friend on the subject, It can be elaborated on if anyone finds the ideas useful or interesting.
I. The source of magic
If you consider that many destructive magics require the creation of destructive forces, fire, lightning and the such, then it is clear that the magic must draw from somewhere the temporal composites of the magic in question. Something after all, cannot come from nothing.
This logically relies on the theory of the multiverse. With the myriad of forces and objects in an infinite multiverse the use of magic seems simple, the drawing of forces and elements from a different universe from your own in order to use it for whatever purpose you had in mind, I.E. flinging a fireball at an elf.
Beings can be sensitive to the distortions and elements of the other verses due to such an evolutionary positive trait as having minute and seemingly insignificant ‘luck’ or fate in your life.
With the spread of the ability to feel elements of the other verses it is only a matter of time before someone accidently draws in a spec of flame from another verse, and thus invents magic. There could have been thousands of previous accidental instances of elements from another verse being drawn into this one, however a single molecule of oxygen or grain of sand is most likely to never be noticed.
This in its small way has advanced the development of the sensitivity to the other verses in all races throughout time via its original minute benefit to natural selection.
II. The use of magic
Using this magic is not a matter of creating a fireball and flinging it, rather a matter of drawing in fire elements or instances from another verse by reaching into the other verse in exactly the right way in order to exploit random breaches in the membrane between this universe and the others. These breaches form thousands of times a second, due to the infinite nature of the multiverses, however to exploit them requires precise understanding on when and how to reach in and extract the elements needed. Accidental conjurations are made, but few are complex enough to be noticeable, even fewer understandable.
Being sensitive was not enough, you have to both ‘see’ and know how to make use of the perception by exploiting breaches.
To understand the use of magic, picture a man who holds his hand up horizontal to his body, then pushes it forward a foot or so so his arm is at a bend from his body. When his arm was straight, this was within the natural host universe, as he reaches forward using his sensitivities in the multiverse and correct state of mind he is distorting the space of the universe as if he is reaching to an invisible shelf and taking out something. In this case a ball of charged lightning.
The whole process is essentially a mental one, no words are needed. However in order to teach the complexities of exploiting breaches words are inevitably to be used. This is then converted into the language of the mind by meditation instructed by the elders of the magic order.
III. The evolution of magic
Magic has evolved differently through different races for example, the elves were the first to evolve the sensitivities to exploit the breaches in the multiverse, and therefore their evolution if more advanced than the humans, whom only recently began to feel the distortions.
Goblins never managed to develop this skill. However they make soul pacts with demons whom will hold the ‘door’ open between the multiverses by reading the goblins mind. In return the goblin is sworn to do the demons bidding.
Dwarfs being the third race to discover multiverse sensitivities use ‘runewords’ which are inscribed on souls stones, stones which have been imbued with the spirits of the dead.
These words are meaningless in themselves, but when used by the dwarf whom made them, they connect the evolutionary gap between dwarf brain and the sensitivity needed to exploit the breaches in the multiverse. Each runeword is that particular dwarfs calling sign for sensitivity to a certain element or object, thus enabling the dwarf to search the multiverse for it. Without these runes the dwarfs would be incapable of drawing anything from the multiverse.