Yeah, as far as I've found, its just the berzerker
You can also use party favour which is in your treasure trove.
berzecker who you can buy at helms deep after completing that level also theres a mythril firework for your treasure trove but cant remember what level thats on
Good thing I got the magical weapons & items DLC pack as a pre-order bonus.
"GET BACK IN YOUR CAGE!" - Paul Steigerwald
where do you get Berzecker
Fireworks are on the main map in the black gate area.