Option 1: A role immune to night actions? OP. Option 2: Drunk clone? Lame. Option 3: Already been suggested in the form of poisoner, etc.. Just a vigil/killer with a delay making it even harder. Option 4: The best of the suggestions. If town-sided it would give the town an extra day if killed, allowing for a NL on LYLO. Reminds me of a less-powerful granny, which is a good thing. I can't think of a good win condition for third-party. I support ONLY this last suggestion.