>>36779132>>36782219The big issue here is the energy conversion factor. How exactly does bringing mass into existence work when it comes to magic quanta? If it follows E=mc^2 then the amount of energy to fat you could convert would be extremely skewed. You'd need ~ 90 Terajoules worth of energy to create a single gram of matter. That's equivalent to about 1.5 Hiroshima nuclear bombs.
So, unless it is rule-of-cool'd, creation and destruction of matter on a macro scale would break the rule against magic nukes. Perhaps the matter could be "borrowed" from somewhere else, or in the case of removing matter, it could be hidden in the Vitium field/Heavenly realm somehow?
Transmutation of fat into water and carbon dioxide and back could also work. In this case, an /ag/ catalognaut could passively gain fat tissue by using magic quanta to form fat molecules from the water they drink, the food they eat, and the air they breathe. The amount of magic quanta stored in the fat tissue would likely be lower than the amount consumed by the process (as part of the energy is used in the act of forming the tissue). Conversely, they could release the bound magic quanta by magically burning this fat, in which case the catalognaut simply breathes out the extra mass (as carbon dioxide and water vapour), or excretes it through other means.
How fast the fat building occurs is up to you, but I would personally lean to something sensible, tied to the amount of air, water, and food the catalognaut can consume. As the process is magical, I think it could reasonably be faster than human metabolism.
Same applies to the release of this energy, but for some reason I think that could be even faster.
I dont think this could easily be applied to inorganic substances without canonizing transmutation in some form.