Also what should the symbol look like?
I think such a wizard would be really limited. Earth already covers gravity, electromagnetism, and more. And the nuclear forces seem kinda useless for anything other than disintegrating things, blowing them up, or soaking them in radioactivity.
Maybe a mastery of Weak Force lets you transform a Real World object back into primordial ectoplasm? Maybe with Strong Force you can for all intents and purposes Create matter from nothing, limited only by size and energy source?
Truly ridiculous energies involved here. To create matter from pure energy (https://en.wikipedia.org/wiki/Matter_creation) you can't just create an electron--you have to create an electron/positron pair. This follows for all matter; you must create your matter's antimatter equivalent in the process...and you'd need to make sure your matter and antimatter stay separate, contain the antimatter, then convert the anti-matter back to pure energy, and dissipate that energy safely...And you'd have to put in a huge amount of energy to do that. Even the most powerful wizards would likely come close to killing themselves just to create tiny amounts of matter. And if you lose control once, the resulting matter-antimatter reaction would keep you from trying a second time.Meh, I wave Magic at it in that case, for the same reasons I dont calculate the caloric requirements of Harry's Fire Magic, or ask about the natural mechanisms behind Force magic. We are only a little sure that's how it works in Nature, and so I wouldnt restrict magic to that same sort of Hard-line Symmetry. If that sort of balance were more of a world-theme, something like every Fire spell cause an equal Chilling effect, etc. then I might get behind the limitation more.