Board Thread:Lore Discussion/@comment-25958616-20150206014401/@comment-4511886-20150209150951

The game would most likely end. The reason it's a bad ending is because you're not the chosen undead, which the whole main storyline is about.

When it comes to defending the flame, you'd have to do that as well in the normal Dark Lord ending, as any undead might come to the Kiln after you've abandoned it. With this in mind, Oscar would likely make the same mistake, or leaving the flame would be permanent. (As permanent as either ending gets, anyway.)