I've gotten pretty deep into plotting out a new piece of fiction and I've been working on for a little while and I was hoping to get some feedback on the magic system I've been developing for it.
The system itself is called Dynatheurgy, with practitioners called Dynatheurgists. The central idea is that Dynatheurgists use their bodies and spirits to process natural energy and redirect it in different ways using Dynatheurgic Bonds. The simplest use case is simply taking the energy as it is and redirecting it somewhere else immediately, with no changes—for example, taking some of the heat from a nearby fire to set on fire a pile of dry leaves.
More advanced uses for Dynatheurgy involves imprinting a small portion of your will into the Bond, which dictates various limits and variables. A 'theurgist could, for example, direct light energy into a stone and will it to release its energy over a period of days, rather than all at once, devising a simple flashlight. By expending an even greater amount of will it is even possible to reshape the energy into a different type, turning light into heat, or even applying it to the 'theurgist's own body as energy reserves to increase their own stamina. There are legends of exceptionally talented Dynatheurgists being able to transform energy into matter, but the amount of energy and will necessary far outstrips reasonable applications.
Common wisdom holds that every person is born with a certain amount of inborn will and as they deplete it they begin to fracture their very soul irreparably. Anecdotal evidence seems to support this, with elder Dynatheurgists tending to be more aloof and less empathetic than their younger cohorts. Given the impossibility to measure such things empirically, however, the truth of the matter is still heavily debated.