Enter Sandman

"Enter Sandman" is a song by the American heavy metal band Metallica. It was released in 1991 as part of their fifth studio album, "Metallica" (commonly known as "The Black Album"). The song was written by the band members James Hetfield, Lars Ulrich, and Kirk Hammett. "Enter Sandman" is notorious for its heavy and aggressive sound, featuring power chords and driving rhythms. With its dark lyrics about nightmares and the fear of falling asleep, the song became one of Metallica's most popular and commercially successful tracks. The original key of the song is E minor, and it is characterized by its iconic guitar riff and catchy melody.