Ellefson told MusicRadar.com
that this song "really epitomizes the story of Megadeth." He explained: "Before starting the record, Johnny K had read Dave's autobiography, and I think that helped him understand Dave's psyche, as well as what Megadeth is all about.
As the song was being developed musically, the words started to spill out onto the page, largely from Johnny's conversations with Dave. If you ever wanted to hear a song that summed up the arc of Megadeth as a band, 13 is it."
He added: "The song ends on such a high. Megadeth hasn't had a big, theatrical kind of song since 'In My Darkest Hour
,' so now we've got another one with 13. It's the perfect ending to a great album."