In Oblivion and Skyrim, when first gaining entry to the various DB sanctuaries, the doors ask you for an answer to a riddle, and when you respond correctly, they welcome you 'home'.
So over the past week or so, I was wondering:
What's up with these doors? Are they some type of enchantment? A window to or a sliver of an aspect of Sithis itself?
It's something that i've never really seen mentioned within the games and I hope you guys can help with.
Edit: I've lurked on this forum for quite a while and was kind of surprised when I realized that this was my first post!