Genre Definition and Recommendation is a feature where I will define a genre and a sub-genre definition and the make some recommendations.
Fantasy - Definition found on Wikipedia
Fantasy is a genre of fiction that commonly uses magic and other supernatural phenomena as a primary plot element, theme, or setting. Many works within the genre take place in imaginary worlds where magic is common. Fantasy is generally distinguished from the genre of science fiction by the expectation that it steers clear of scientific themes, though there is a great deal of overlap between the two, both of which are subgenres of speculative fiction.
Dark Fantasy Definition found on Wikipedia
Dark fantasy is a subgenre of fantasy which can refer to literary, artistic, and filmic works that combine fantasy with elements of horror. The term can be used broadly to refer to fantastical works that have a dark, gloomy atmosphere or a sense of horror and dread.