A cube with only black cards!.. There are a lot of tutors so you can really build around a certain card if you want. Some well supported archetypes include ramp, aggro, reanimator/graveyard matters, aristocrats, and of course other smaller things. I kind of wanted to have a life gain theme but the cards I had for it seem too little too late, but there are ways to gain life. I would love love love a death's shadow theme in the deck where u want to pay life and stuff but I don't have enough cards that want to do that.