Raven Crowking said:
The terms "high" and "low" relate to some standard median. In D&D 3.X, the standard median is very clearly spelled out. From a D&D standpoint, anything significantly lower than this median is "low magic" and anything significantly higher than this median is "high magic".
From a literary standpoint, the terms "low magic" and "high magic" most often relate to how the characters interact with magic, rather than with the presence or absence of magic in the setting. If most magical effects are within the means of the POV characters, or of the average citizen of the setting, the work is considered "high magic". If most magical effects are not within the means of the POV characters, and not within the means of the average citizen of the setting, the work is considered "low magic". In some cases these terms are used instead to represent what magic can accomplish; in this case keeping the higher level spells rare through controlling NPCs and slower level gain is sufficient.
The works of Robert E. Howard are almost always considered "low magic", yet magic is often used against the heroes...and even by the heroes (example, Solomon Kane's staff).
From a literary standpoint, my game world would probably be considered "mid magic", were such a term in common parlance. From a D&D 3e standpoint, however, it is definitely low magic.
RC
I like the part in bold as an initial working definition of "low" to "high" magic a little more helpful than low magic = no magic. In a game I would use the term in two ways, is it a low/med/hig magic world and are the adventures low/med/high magic. I wouldn't mix the two as a party of adventurers might be quite out of the ordinary compared to the average joe.
The level of magic in a game is not just frequency of spell use to me but also the power of the spells relative to arms/non-magical means, the prevalence of permanent magical items, the prevalence of magic use in mundane tasks, and frequency of spell casters. Let me describe a setting (my own) I consider low-to-mid magic then describe REHs Hour of The Dragon.
IMC (which is not standard D&D) a person able to use magic is pretty rare based on minimum ability requirements (which PCs can often meet), only 1 in a 1000 to 1,500 can be spell casters. To give you an idea of what this means, this is about the frequency of medical doctors in the US. So certainly they are highly skilled and paid people but not unheard of especially in the cities. On the other hand, temples in even large villages (200-400 people) are more likely to be staffed by a lay brother instead of a spell wielder. Those who attain levels high enough to make permanent magic items (besides potions, scrolls, etc.) are 1 in 100,000. Magic items would be exceedingly rare IMC if people hadn't been making them for about 10,000 years. On the frequency of magical items, IMC they are rare and considered a strategic resource (no open magic item market). A well equipped nation might have a +1 sword per 100 soldiers. More powerful magic items are reserved for leaders and very special units. It is not a great comparison, but magic items might be viewed as a tank, nations can afford them, and lots of them, but the vast majority of people never could. The common people will see them on parade days or, unfortuantely, when used against them.
On spell power, IMC there are few, if any, permanent effect spells. Magic can really help society but often in only subtle/tactical ways. The lower number of spell casters means they are unlikely to stop a plague (unless caught very early) but they can save a few select individuals. In the economy, magic could be used to give a boost each day to construction, but again limited spell casters of sufficient level means this is an expedient for the wealthy and does not replace more mundane methods. Divination magic might be the most influential, the mere ability to predict the weather (even with just the present day accuracy a few days in advance) could help avoid disasters, allow people to prepare for hurricanes, get crops in before a storm, avoid planting before a frost, etc. Such a simple thing would have made a big difference to a medieval farmer for example, and a good example of why priests were first astronomers. In warfare, low level spells have little advantage over arms in shear damage potential but can provide some tactical advantage on a small scale given their area of effect and duration. Spells that get to the point of doing respectable damage to a structure are of sufficeint level that only 1 in 5,000 to 10,000 can cast them. Again these people are of limited number. People being what they are, kingdoms will want to stockpile as many scrolls as they can for war, still there will be a limited supply even if you got every mage in the kingdom writing scrolls full time (a risky approach since you might not want to alienate people with such a rare gift).
Adventures IMC, yes spell use is practiced by PCs in about every or every other encounter. At low levels they do not encounter many spell casters casting against them, but they do encounter magic much, much more frequently than in the outside world. After all, they are seeking out those places where it could be found.
So for relatively constant prevalence, common use by adventurers, but no blatant impact on the day-to-day lives of people and something most people could never practice, I'd rate this campaign as low to mid magic.
In REHs Hour of the Dragon, Conan is a deposed King (so name level?) he encounters no less than seven spell casters from his age (not counting the one incredibly powerful BBEG). We have the witch who seems to have some mid-level druidic magic, the fallen priest of Mitra who seems mid to high level, the priest of Asura also mid-to-high level, and the four mages from Khaitan (IIRC) very high level. Also mentioned are other magic wiedling priests of Asura and Mitra, let alone the ever present sorcerors of Stygia we hear about. When magic is encounterd in REH it is often very, very powerful. This setting is typically consider "low magic" but magic is far from infrequent from Conan's perspective, he's always encountering it; and further, the power of the magic is rarely "low". Maybe people think of it as "low" because Conan doesn't use it and most people in his world don't. It's rare but seems to exist in every major city and a whole kingdom, Stygia, is ruled by mages/priests. Maybe it's because magic items are very rare, but when they do occur they are very powerful. Finally, maybe it is because spell casting is more ritualistic and less suited to combat.
All in all a very long winded way of saying, a discussion of what is or is not "low" magic will go in circles unless (IMHO) one starts with a specific definition, whatever that may be.