Several years ago this kind of story would have been cool, but over the years it's been done ad nauseum. The idea of the great hero falling from grace existed long before Lord Soth (though he was perhaps one of the most well known in his time), then Arthas from Warcraft 3 made it popular again, and eventually we saw it done again and again and again in World of Warcraft when they added the Death Knights. You could even say that it was also made popular in a way by Star Wars with the prequels, seeing Anakin Skywalker rise and then fall to become Darth Vader.
I'm not saying it's a terrible idea, just that sadly it's like a dead horse roleplay concept in my book.
I'm not saying it's a terrible idea, just that sadly it's like a dead horse roleplay concept in my book.