The theme of this twobert is a bunch of necromancers getting together to dick around with a bunch of corpses.
These are the goals of the cube:
Particularly important, I want to put more weight on the mechanics being flavorful than the fluff, so channel and bloodrush are very very similar to madness for me.
I want to avoid decks that are just piles of good cards. I'd like decks to feel like they have tight gameplans, or are otherwise dynamic and reactive.