Genres
Low fantasy
Fantasy defined negatively: magic is rare or marginal in an otherwise mundane, human-dominated world.
Low fantasy is defined negatively, as not high fantasy: magic is rare or marginal in an otherwise mundane, human-dominated world. The fantastic, when it appears, stands out against the ordinary rather than saturating it.
The definition-by-contrast makes it a useful writing constraint: scarcity of magic is a cost and limit built into the genre itself, and every use of the fantastic is an event.