How many satanic Heavy Metal bands are there?

It's difficult to say exactly, as there is no definitive list of satanic heavy metal bands. The genre of heavy metal music has a wide range of bands that explore different themes and styles. Some bands may incorporate satanic imagery or themes into their music or lyrics, while others may focus on different topics. It's important to remember that not all heavy metal bands are satanic, and it is a highly diverse genre with many subgenres and styles.