This is the sequel to "Xell", "ΣXell" (no relation to ΔMax, by DM Ashura). "ΣXell" (pronouced either "Sigma Xell" or "Ex-el" ) is a remix of "Xell", with revised beats, chord progressions and pulse-pounding drums. The scream inthe song is from the videogame "Sinistar". ΣXell runs a bit slowler than the original - 150 BPM compared to Xell's 156 BPM, however it's louder, harder beats more than make up for it.