Black metal is a subgenre of heavy metal? I know it's often used specifically to describe bands that play that classic old school sound, like Black Sabbath, Judas Priest etc, but it's also a catch all term for the whole genre. Even if it's often abbreviated to just "metal" these days.
Also, who the hell is Kekal?
Also, please, don't put such minor and unknown band like Kenkal, it's un-guessable for the whole majority of players.
Disagree concerning Kekal : it's a pleasure to discover the unknown bands! And it's fun, as long as it's the only one!