Songfacts®:

• Lyrically, this song is the precursor to Hail To The King's closing track, "Acid Rain." Guitarist Synyster Gates explained to MusicRadar.com: "It's about a meteoric, intergalactic war that results in an apocalypse and the human species aligning together to go fight something much better than us, our individual trials and tribulations."
  
  Gates added: "Musically, the song was incredibly difficult to write and pull off – the elements of dissonance, tension and resolution. We wanted to have that friction throughout, but it still had to be palatable; it couldn't be like listening to Penderecki or Stockhausen. There had to be a relatability and connectability to it."
• Vocalist M.Shadows commented to Kerrang! magazine: "This song is an intergalactic Darth Vader type thing – it's like the Imperial March with horns and a pure metal attack."