Music magazine "Billboard" quoted Black as revealing that "We just laid down a hot [...] we're calling it the bomb track. It's a very powerful recording called "Deth Starr" [...] so it has nothing to do with the "Star Wars" [Death Star]," adding that "It's kind of sci-fi, doomsday rock." Jack Black also stated on the Late Show with David Letterman that he had an idea for a song called "Rize of the Fenix", which he described as a "rise from the ashes" workout song similar to "Eye of the Tiger". He performed a vocal sample of the song along with keyboards.