Slayer
Hell Awaits
Slayer’s Hell Awaits was released back in 1985, and it is the cover song of the album with the same name. As a fun fact, Hell Awaits is the second studio album released by Slayer, who identified itself as being a thrash metal band.
Apart from the obvious biblical setting, where Hell clashes with Heaven, a theme which can be interpreted in various ways, the song also has various backmasking messages.
For instance, if you play the intro backward, you can repeatedly hear the phrase “Join Us!”. The same intro contains another easter egg, in the form of a whispered “Welcome Back!” According to the Slayer, the “Welcome back!” phrase heard in the song’s intro, is the band’s way of thanking their fans for the second album.