This is adding the final five fetchlands, adding a minor discard subtheme (and so swapping the Tango Lands like Canopy Vista for the cycling duals like Scattered Groves). Conspiracy Theorist, Containment Construct and Currency Converter now form an additional three cards to generate value on the back of discarding (along with Master of Death who is already in the cube).
I've also pushed towards Artifacts a little harder - with cards like Stonecoil Serpent and Silver Raven as additions over Endless One and Pteramander.
I found blue spells-matter wasn't working so well on its own. Thing in the Ice and Pteramander have come out.
We've also focused a little harder on U/B Tempo and so more Ninja-synergies have been added - from Moon-Circuit Hacker and Grazilaxx, Illithid Scholar over the slower Waker of Waves and Cloudkin Seer.
I've tried to clean up a few of the needlessly wordy cards in the cube Animate Dead has moved to an older (cleaner) printing, and Incinerate (whose non-regeneration clause only really affected Experiment One) has been swapped for Lightning Strike's "Any Target" version.
There's also a push towards some slightly newer, more interesting cards. Delayed Blast Fireball over Staggershock, Noble's Purse, Monster Manual and Altar of Bhaal are all the new hotness, along with Henrika Domnathi.
All-in-all, it's an interesting series of changes.
I've also included Damn and Lurrus of the Dream Den as "hybrid" Orzhov cards. Damn is probably 75% white, 25% black, but it would still get played in decks that are primarily black as a slower removal spell.
Will Kenrith and Hall of the Storm Giants should help U/x control decks finish more reliably.
W:
Lion Sash
U:
The Reality Chip
Tezzeret, Betrayer of Flesh
B:
Soul Transfer - Super interesting/modal Sorcery Planeswalker removal.
Tribute to Horobi
Blade of the Oni
Nashi, Moon Sage's Scion - Not too keen, but good.
R:
Rabbit Battery - Low-cost Haste enabler.
Fable of the Mirror-Breaker - Red History of Benalia ++
Twinshot Sniper - Maybe too cute. Artifact synergies?
Thundering Raiju - RDW/Midrange card -
G:
Lands:
Other:
Kaito Shizuki
Eater of Virtue - Bonesplitter #2.
Containment Construct - Probably too cute to be good?
Preparing for cube expansions.
U:
Thirst for Discovery
Scattered Thoughts
Patchwork Crawler
B:
Graf Reaver
Undead Butler
Fell Stinger
Headless Rider
G:
Ulvenwald Oddity
Cemetary Prowler
Ascendant Packleader
Other:
Halana and Alena, Partners - Super interesting haste enabler.
W:
Intrepid Adversary
Cathar Commando
Adeline, Resplendent Cathar
Fateful Absence
Sigardian Savior
U:
Memory Deluge
Spectral Adversary
Suspicious Stowaway
Poppet Stitcher
Consider
Memory Deluge
B:
Champion of the Perished
Infernal Grasp
Tainted Adversary
Jadar, Ghoulcaller of Nephalia
Jerren, Corrupted Bishop
The Meathook Massacre
R:
Falkenrath Pit Fighter
Moonveil Regent
Cathartic Pyre
Bloodthirsty Adversary
Reckless Stormseeker
G:
Deathbonnet Sprout
Augur of Autumn
Primal Adversary
Outland Liberator
Other:
Fleshtaker
W:
Solitude
Esper Sentinel
Timeless Dragon
U:
Lose Focus
Suspend
Subtlety
Svyelun of Sea and Sky
B:
Damn
Persist
Dauthi Voidwalker
Grief
Unmarked Grave
Archon of Cruelty
Tourach, Dread Cantor
R:
Blazing Rootwalla
Ragavan, Nimble Pilferer
Flametongue Yearling
Fury
Dragon's Rage Channeler
Breya's Apprentice
G:
Endurance
Ignoble Hierarch
Abundant Harvest
Sylvan Anthem
Gaea's Will
Verdant Command
Thrasta, Tempest's Roar
Sanctum Weaver ??
Foundation Breaker
Timeless Witness
G/C:
Kaldra Compleat
Sword of Hearth and Home
Grist, the Hunger Tide
Master of Death
Priest of Fell Rites
Cards to keep an eye on. These are cards that I think are either powerful or fun, and so would be interesting additions to the cube:
White:Parallax Wave - Powerful card, flicker support, minor combo support, etc.
Prismatic Ending
Rite of Replication / Mythos of Illuna - More interesting clone effects.
Complicate - Fun/interesting situational 3CMC counterspell.
Brazen Borrower - too expensive right now, but incredibly powerful.
Shelldock Isle - Incredibly powerful blue card.
Glen Elendra Archmage - Add Persist synergy.
Sedgemoor Witch - Riff on Young Pyromancer, but in black, with a better body. Very interesting card.
Nullpriest of Oblivion - 2/1 for 2 with relevant body that scales into late game.
Summon the Pack - "You win the game", at significant cost. Powerful & flashy.
Dark Confidant - Pricy, great card w. humans support.
Valki, God of Lies - Completely playable black card that doubles as a lategame mana sink in Rakdos decks.
Chaos Warp
Opportunistic Dragon - Sweet, anti-humans & artifacts.
Pest Infestation - Spell for tokens that also destroys things? Amazing rate.
Mazemind Tome - Powerful card advantage engine.
Nykthos, Shrine to Nyx
Nicol Bolas, God-Pharaoh - Pushes Grixis in a fun direction.
Fiend Artisan - Powerful hybrid value creature.
Lurrus of the Dream-Den - Powerful hybrid value creature.
Jegantha, the Wellspring
MDFC's:
Jwari Disruption (Probably should be Censor?)
Glasspool Mimic - Needs to get in the cube ASAP. Great card and very versatile.
Sea Gate Restoration - Powerful late-game card. Only reason it is not run is due to price.
Emeria's Call - As above, but less cost prohibitive.
Malakir Rebirth
Sejiri Shelter
Spikefield Hazard
Tangled Florahedron / Turntimber Symbiosis - Both powerful green cards. Florahedron is the less exciting card. Turntimber is very good in cheaty decks, but a fine value card elsewhere. Even finding a three drop is good value.
MDFC spell/lands add a lot of versatility to decks, allowing them to find lands or spells. It makes gameplay far more reliable, and so helps prevent screw/flood - keeping games interesting, They are "boring" cards that lead to interesting games.