Magic

​Prevalence of Magic
I would call my world mid-fantasy. Magic exists on Rojopotis, and people know about it, but most people have rarely, if ever, experienced magic and have very little understanding of it. Your average village might have a cleric who can preform a healing cantrip or two, but most people live their lives without the aid of magic. Even people who call themselves "wizards" are often only those who have studied magic but do not have the ability to preform it themselves. People live the life of a druid, and maybe even commune with nature spirits, without being given any power. Of course things were different in ages past, but now the gods have left and the world is a little quieter, though not necessarily safer from the forces of darkness.

In the lesser material planes magic is much more prevalent.

Limits of Magic
There are some things magic cannot do. There are spells to cure diseases, but they mainly work on fast acting viruses and the like. Many slower diseases are immune to magic. A person killed by such a disease cannot be revived.

PCs vs NPCs
I will, of course, let players learn any spells the rules say they can learn. But it is possible that they are the only person in the world that knows that spell. NPCs don't necessarily have access to the same spell lists. In fact there are NPCs that do things players will never be able to do.

Kinds of Magic
Most of what would be impossible to do in our world is labeled as magic in D&D. For people in my world, however, the word magic specifically applies to arcane magic. There are several different sources kinds of magic in my world, but this list is not exact and some expressions of magic may draw from multiple sources.

Arcane Magic
The general gist of arcane magic is gaining mastery over the world. It is the magic of sorcerers and wizards. Naming, necromancy, and alchemy are all examples of arcane magic practices.

Divine Magic
Divine magic relies entirely on the power of the gods and powers. It is the magic of clerics and paladins, who gain power from a god they are devoted to, usually via a saint. It is also the magic of druids and rangers, who gain power from Nature, usually via nature spirits.

Old Magic
Old magic draws on primordial power from the creation of the world. This is the magic of bards, who can feel the vibrations passing through Mishtar and join in the song.

Heavenly/Fiendish Power
Celestials and fiends have many ways to influence the world, including through warlocks.

Primordial Power
Elder Gods, who constantly probe into Mishtar, influence magic and can grant power to warlocks.