[ Five smiles, genuinely, despite himself when Ben seems to check himself for decay. It's short-lived, when he has nothing but bad news for him. ]

They come in all shapes and sizes. From your stumbling corpses, to your fully realized overlords. [ To your previously-dead brothers. ] I've seen ghosts. We all have. Klaus would have loved it.

[ As for the advantage, that's much more complicated. ]

The list is just blackmail. I'm... still working on the rest.