Low fantasy, or intrusion fantasy, is a subgenre of fantasy fiction in which magical events intrude on an otherwise normal world. The term thus contrasts with high fantasy stories, which take place in fictional worlds that have their own sets of rules and physical laws.
Intrusion fantasy places less emphasis on elements typically associated with fantasy and sets a narrative in realistic environments with elements of the fantastical. Sometimes, there are just enough fantastical elements to make ambiguous the boundary between what is real and what is purely psychological or supernatural. The word "low" refers to the familiarity of the world within which fantasy elements appear and is not a remark on the work's overall quality.
