I added some cards at different mana values, added an enchantment that likes big graveyards, a way to recur from other graveyards, a way to investigate that doubles as removal, and finally a discard spell that doubles as self-mill. Of particular note is marionette master which should be strong in this cube given the amount of token artifacts. However, most involve a cost to sacrifice them, so I think that is ok. This card also adds counters and tokens to black which I withheld from it previously.