I been thinking about it, we as GMs need to be discerning about magic
The very first rule I personally fall onto as GM
“Look at your party. The kind of characters they play will ultimately shape the game world”
If a Wizard is in play, Magical and Arcane elements Will come into play
But magic is really affected on the tone and style of the game almost as much as settings and monsters
So I say if you want magic to not break your game, ask some of these questions…
-How tolerated is magic by the population?
-How in depth should the study and process of magic be?
-How difficult is it to use magic?
-What new spells outside the book can they discover?
-Who or What is perfectly attuned to magic if anyone?
-What behaviors make magic unique? (ex. formed from fairy spirits)
-What opposition focuses on magic?
If nothing else, look towards a literature or media source, and encourage the style wether Magic is tough but high reward or Magic is as simple as a snap of a finger… make it fit the tone and tyle of your game just like anything else. And Create new spells that fit in