Listen to Merciless Soldier online. Merciless Soldier is an English language song and is sung by Elm Street. Merciless Soldier, from the album Songs for When You Are Pissed Off: Heavy Metal, Death Metal, Doom Metal, Black Metal, Power Metal, And Grindcore for When You Need to Blow Off Some Steam, was released in the year 2014. The duration of the song is 3:54. Download English songs online from JioSaavn.