174 - Black Sabbath Children of the Grave 1971

"Master of reality" is certainly the heaviest album in the entire Sabbath catalog. "Children of the Grave" talks about how next generations should not do the same mistakes has their predecessors and that they should use peace instead of war. The subject of this song is just insane and the music is great. A pretty heavy guitar riff that almost sounds like trash metal, nice lyrics and vocals, nice drumming and bass and guitar completely matches. Iommi´s solo is also great.