Falstad Darak is the second (and third) big boss in No Rest for the Wicked. While he looks tough (and he is), you shouldn't have too much trouble. Here's how to beat Falstad Darak in No Rest for the Wicked.
No Rest for the Bad Guys: Falstead Darak Boss Guide (The Black Trench/Second Battle)
Before you take on this big guy in No Rest for the Wicked, here are a few things you should take with you:
If you have all of the above, get ready to fight Falstad Darak. Spoiler alert: His bark is meaner than his bite.
To defeat Falstad Darak in No Rest for the Wicked, dodge his barrage of attacks (by rolling behind him), hit him once or twice, and repeat until he's dead. That's all you have to do.