For cube, I've been thinking more and more about cards a) that can block well, b) provide some measure of additional utility or value, and c) aren't too oppressive to aggro strategies
Dictate of Kruphix, Dictate of Karametra, or Kami of the Crescent Moon are enough reason for your opponents to keep you in play, but they tend to favor everyone equally and don't put you ahead
Heres the full list of cuts from the deck: Ob Nixilis Reignited Demonic Covenant Deathreap Ritual Inscription of Abundance Convert to Slime Harmonize Whispersilk Cloak Burnished Hart Carrion Grub Giant Adephage Gnarlwood Dryad Moldgraf Millipede Obsessive Skinner Old Stickfingers Rendmaw, Creaking Nest Sakura-Tribe Elder Scavenging Ooze Skola Grovedancer Solemn Simulacrum Suspicious Bookcase Ursine Monstrosity Vile Mutilator Jungle Hollow Additions The actual upgrades come in here, and can be neatly divided into a few packages
Whether the 11 or so bird cards in Final Fantasy were propped up by Bloomburrow or it's just the sheer love of chocobos that's created the interest, it's a good time to own a load of bird typal cards
How much devotion to black does it take before Gray Merchant even pulls ahead