If it is Vikings only how about something like Berserker
. Fits the Viking theme if you know about Vikings and the Norse People.
I never win these kinds of things.. No point for me to list any nifty word I come across while reading a dictionary.
bleg.. noticed someone put berserk.. but they were
As for some names suggested..
Hammer is a pump gun already. Thor is a regulator.
Fearsys.. Not to bust your chops.. but Vikings didn't invent the Blitzkrieg.. That term wasn't used until WWII.. They just did surprise attacks..
Sorry for the rant.. Kinda the mood I'm in.. No hard feelings..