I'm worried about the oath leading to bad things for our hero Will. Guessing we should expect a lot of tragedy. I'm guessing they'll work in some romance with book 2 and beyond (starting a family was a big thing Mary and Will kept mentioning).
How do you even stand up against a god with multiple doppelgangers he can use in place of his actual form? Seems like this struggle against the undead might never end.
Me personally, I'd take stagnated immortality over a mortal life any day. Not being able to eat or drink kind of stinks, but eh, whatever, I can still read books and play games assuming I'm not turned into a ghostly spector.