I originally got this subclass quite a few months ago when creating a fighter/sorcerer multi-class. I love this class. It is both mechanically and narratively interesting, and not overpowered or boring. For those interested, this pairs really well with the "Sealed Horror," sorcerer homebrew origin. I'd recommend this fighter class for sure, especially if you want something that suits a rich but tragic fighter backstory.

While it might be a short little add on, it was well thought out and seemed pretty fairly tested. Good job!