The word is metaphor, not synonym, you retard. And it's /Valhalla/, not Walhalla

I like the use of Norse mythology. It's entirely appropriate given that the Third Reich was steeped in it.

You should come to the LiveJournal Hellsing community. There are many Hellsing fanfic writers there who can help you. You would benefit from a proofreader to catch the typos that are an inevitable result of writing fast to try to get the ideas out before the Muse goes on holiday.