 In March 2014, Metallica began a tour called "Metallica By Request", in which fans requested songs for the band to perform, and a new song, titled "Lords of Summer", was written for the concerts and released as a "first take" demo in March 2014.A Black Friday exclusive single featuring the "First Pass Version" and a live version limited to 4,000 copies was released later that year on vinyl.In March 2015, Ulrich told "Rolling Stone" that twenty songs had been written for the album, and that he hoped some of them could be played at their shows later in the year.