Locrian
The Locrian mode is the seventh mode of the major scale, characterized by its unique sequence of whole and half steps. It is often described as having a diminished quality due to its flattened fifth scale degree. This gives the Locrian mode a distinct sound that can evoke feelings of tension or instability.
In music theory, the Locrian mode is less commonly used than other modes, primarily because its diminished fifth can make it challenging to create a strong tonal center. However, it can be found in various genres, including jazz and metal, where its dissonant qualities can enhance the emotional impact of a piece.