Additions:
Worldsoul's Rage provides great redundancy in the landfall colors plus adds extra utility.
Academy Rector is fantastic for decks reliant on a single enchantment as its main combo enabler, such as Food Chain, Intruder Alarm, Survival of the Fittest, Aluren, and the rest. This mostly benefits , which is good, can always use it.
Dour Port-Mage is crazy in Ninjas and Intruder Alarm / Lonis, Cryptozoologist / any other deck that uses Shrieking Drake type effects.
Iridescent Vinelasher may not be in landfall colors, but being in tutor colors it's easy enough to splash, plus having double fetches there's enough incidental synergy for it to work standalone.
Warren Soultrader is an excellent value engine in any token deck, especially one that benefits from extra mana, such as Chatterfang, Squirrel General.
Organ Harvest reads a little funny but boils down to being an efficient way to sacrifice eggs for aristocrats as well as gain mana for combos. Incredible card, incredible I Love Lucy reference.
In a similar vein, Rain of Filth joins the fray as a little more landfall support in . Hopefully this will help nudge Iridescent Vinelasher.
Shorikai, Genesis Engine can do so many things, but is focusing on being a mana sink and blink target here. The draw is incredible for blink decks and will be thoroughly appreciated, plus it being an artifact helps tremendously with synergy elsewhere.
Deductions:
Mimic Vat never found its home, aggro was too fast, combo was too piece reliant, and control was too slow.
Flash is an incredibly powerful card and has some game ending interactions in the cube, such as Craterhoof Behemoth, however its traditional use case is stilted a bit by a lack of one card combos by the cube's design. From where Flash is kneeling it must seem like an 18 carat run of bad luck. Truth is, the game was rigged from the start.
Ashling, Flame Dancer is unfortunately too win-more with all the spell doubling and even in storm.
Dance of the Manse is a solid card, but being multicolor hurts it and its effect isn't unique. Back to the maybeboard.
Cling to Dust had some fringe use cases, especially with Insidious Roots, however its escape costs never felt correct and it doesn't come up enough to be a strong enough card. Maybe in the future when there's more graveyard shenanigans that are on a higher power level.
Osgir, the Reconstructor is an example of a card that looks amazing but doesn't play out the way you want it to. His second ability is sweet, he has vigilance, you can use it in main two, it's so good! I's way too slow for the kind of deck you want to play it in, and unfortunately no one drafts him anymore. RIP.
Fierce Empath is such a linear tutor that it is often cut for not having any targets. It's sick when it grabs Craterhoof Behemoth, though.
Late to Dinner is great recursion and synergizes with lots of cards, however room has to be made. Very sad day.