Mixing in your face, totally melodic Death metal riffs with lyrics about the usually untalked about darker side of Christianity, Immortal Souls have made the dark lord himself pretty happy with the band.
I'm not sure if I have missed something about what you mean by this, but do you know that Immortal Souls is a Christian band? So I hope that Satan would not be happy about what the band is doing.
They do talk about fear and the struggles that you can have as a Christian (which is perfectly good and fine to do because we all go through emotions like this and it's good to talk about them and not keep them bottled in), but they also talk about how to deal with these fears.
i.e. from the song Idlestate some lyrics are:
"I submit myself for thee.
I resist so it would flee.
Though I walk the valley of the shadow of death, I will have no fear in me.
For thou art with me thy rod and thy staff, they bring comfort to my soul."
These are from the Bible about how to submit ourselves to God in times of fear etc. (i.e. James 4:7
and Psalm 23:4
I think Immortal Souls is a very good band. I don't have their new CD yet, but I want to buy it soon because from what I've heard of the songs posted on their myspace page (http://www.myspace.com/immortalsouls
), the CD is really good.