Listen to Demonslayer online. Demonslayer is an English language song and is sung by Debauchery. Demonslayer, from the album Heavy Metal Halloween: Killer Tracks by Epica, Therion, Meshuggah, Sabaton, Soilwork & More!, was released in the year 2014. The duration of the song is 6:00. Download English songs online from JioSaavn.