Okay, so we all know that shadowmere was present during both the events of oblivion and skyrim, making him at least 200 years old, probably older, as he was owned by lucien lachance before he awarded him to the hero of kvatch. I'm no horse expert, but im pretty sure they dont usually live to be 200 years old. So what exactly is he?
We also know that it is possible that he is genderless as he is referred both as "he" and "she" in both games, if this is the case then what exactly is he/she? Could it be that he is some sort of Daedra? Taking his genderless and seemingly immortal characteristics into account this would make sense. But if he is then what prince does he belong to? Could shadowmere be conclusive evidence that the night mother is mephala? Could that pit he rises from be a portal to oblivion?
Or is shadowmere something else?
All i know is that he is no ordinary horse. So what is he?