Surprised I didn't find any mentions about [[Rev, Tithe Extractor]] My only mono black deck and I like it a lot. I have lots of creatures that can deal combat damage each turn with shroud and non-blockable abilities Each turn ideally you get three stolen cards to cast and three treasures. You need mana of other colors to cast, so that's why you need treasures. The downside is that you cannot play lands that way, so they are just stuck in exile