Vengeance Paladin is en route to damnation
("Dragon Heist" was the starting point of this thing, and due to real life happening, we branched out before completing the module.)
Lv 8 Hill Dwarf, Vengeance Paladin of Moradin. Was on a quest to save the souls of a couple of children whose parents literally sold their souls to Asmodeus and needed a craptonne of cash to redeem them. We never got all the money and ran out of time. Since my Paladin swore an Oath to save the kids, kind of backed himself into a corner when confronted by Asmodeus.
Do I break the Oath and abandon the kids? I don't have the money... four lv 8 characters can't take down a Deity... Wound up trading my Paladin's soul for the kids. Determined to make it as hard on Asmodeus as possible. But me the player is anticipating at some point going Oathbreaker and embracing it.
Now lv 9, multiclassed into Fiend Warlock. The theme on that is Asmodeus having fun tempting the Paladin with power and so gifted the new abilities.