testlum says:
As an aside, I wonder what relation this duology has with the game Slay The Spire. For those not familiar, it's a roguelike card game where you go through a dungeon and past a city, to climb a Spire and slay a Heart. It could be coincidence, of course, but heck of a one!
Oh my, I never realized that! But I guess it could have been used as an inspiration if we look at the developer's other games:
Unbound - literally the first quest you have in Skyrim (and also an intriguing game that I consider running in the future)
Hollows - essentially the developers' attempt to have a souls-like tabletop RPG and one of the key mechanics in Dark Souls