here's what frederick has to say about Slaves of fear :
“‘Slaves Of Fear’ is not the all-typical Amon Amarth song. It was one of the last songs we finished for the album and what makes this song a little bit different is the collaboration between me and [guitarist] Olavi [Mikkonen] as songwriters. Usually, most songs are written by Olavi and [guitarist] Johan [Söderberg]. It’s definitely one of the darkest songs we’ve ever written and the main/intro riff is my personal tribute to the passing of Ronnie James Dio as the riff came to me after listening to Holy Diver. Lyrically, it’s about how religions keep people under its control and from thinking for themselves. It includes some of the most angry lyrics [vocalist] Johan [Hegg] has written and they kind of remind me of ‘The Sound Of Eight Hooves’ [off 2001's The Crusher full-length] in a way. It works exceptionally well with the melancholic feel of the riffs.”