The lyrics are about a being called 'Black Mamba' that not only interferes with the members' and avatar's connection, but also threatens their world and as such is abhorred by the members. Musically, 'Black Mamba' was described as a pop, electropop and dance-pop track with a signature synth and EDM sound and bass that is paired with an addictive hook. The song was written and composed by Yoo Young-jin, while also composed by Omega, Ella Isaacson, Gabriela Geneva (NIIVA), Jordan Reyes, Shaun Lopez and Scott Chesak. Originally released as a standalone single on November 17, 2020, by SM Entertainment, the song was later included on the group's second extended play Girls, which was released on July 8, 2022.
