Whether magic is rare or not, there may be laws that vary by location about its usage. We can create an entire area of law, crime, and punishments. These often originate from problems that have already occurred, so think about wizards doing bad things, especially in public, and how society has tried to deter this. We can invent some history and infamous incidents and characters (including victims), after whom a law may be named.
How can they inhibit wizards? The purposeful use of anti-magic zones is one way, in sensitive areas like a courthouse, or a device that can be placed on someone to cut them off from magic. Maybe they’ve figured out how to permanently remove the ability. Perhaps they can only limit access, such as making someone weaker so that only minor spells can be done. If they don’t have a supernatural way to inhibit, they could just drug someone so that they’re too weak to do it and regularly administer this. We can invent plants that have this effect once properly prepared. Where there’s a will, there’s a way.
The more common magic usage is, the more social customs will arise from it. Casting a spell on our date without their permission is probably frowned on! But is casting a spell on ourselves prior to it okay? That likely depends on the result. If it’s considered dishonest, like making us appear 100 lbs. lighter, this is probably bad, but if we only changed our hair color, maybe not. It depends on whether we’re up front about these things. To create these, think about how life would be and what you’d want to do if you had magic and how others would react to you doing it.
There’s always a power disparity between wizards and muggles, to use a Harry Potter term. Do people consider it rude for a wizard to use magic with non-magical people? How concerned are people about this? Imagine being one of the few who can’t do magic and how intimidating that might be, and how we might try to hide it or compensate. What if we’re the lone person who’s unaffected by magic? What sort of bullying is done due to magic or via it? Be prepared to think about these elements if magic is prevalent.
Some communities might reject magic while others take advantage of it. Religious beliefs or conservative values (that resist change) can affect this. So can fear and significant historical acts. It’s an oversight to not have such places, or even zealots who denounce wizards or are on a crusade to capture, kill, or render them magicless. By contrast, some will worship the powerful or seek to be an apprentice, resulting in fierce competition. Sorcerers might be viewed like athletes are here. Give serious thought to what social elements are impacted.
