Karnak originally gave Siegfried those orders back at the end of The Shadow of Siegfried. Looks like he finally found what he was looking for.
I've been listening to lots of death metal and black metal as inspiration for this story. Here are two prime examples of my personal "soundtrack from Hell." This is the really violent, brutal metal so it's not for everyone... but it does the trick for me.
Dimmu Borgir - "Gateways"
Behemoth - "At the Left Hand ov God"
I could've picked more songs, but Behemoth and Dimmu Borgir are the only "hellish" bands I listen to. They're two fitting choices, I believe, since I think the driving brutality of Behemoth's sound is definitive of Siegfried while the sweeping melodic sound of Dimmu Borgir is appropriate for Karnak.
I hope that Nergal gets well soon and I want Shagrath's tentacle hat.
That's all from me for now.