This class option is very well presented. If you're looking to inject some norse flavor into a campaign, this makes for a great starting point. I was intrigued by te concept. When considering Vikings, I always default to thinking of barbarians and rogues. Paladin never would have been my starting point for a viking themed sub-class but the unique feel this brings gets top marks from me.
The class is infused with unique flavorful abilities that feel well balanced without being over-powered. As a DM, I'd be more than comfortable allowing a player to bring this sub-class into my campaign.
I look forward to more Norse themed options from this creator in the future.