There are the cards that we either took out never added to the cube. I own these cards and they exist unsleeved inside the cube's box. These are cards that have proven to either be underwhelming, were not seeing enough play, or were cut because we were trying to keep the size of the cube down.
I'm listing these here so people can make a case for or against any of these cards.
White
Martyr of Sands
Descendant of Kiyomaro
Jotun Grunt
Sunlance
Pulse of the Fields
Momentary Blink
Empyrial Armor
Resurrection
Jareth, Leonine Titan
Pacifism
Ranger of Eos
Order of Whiteclay
Knight of the White Orchid
Samurai of the Pale Curtain
Enlightened Tutor (3/17/09)
Magus of the Disk (3/17/09)
Magus of the Moat (3/17/09)
Magus of the Tabernacle (3/17/09)
Masako the Humorless (5/11/09)
Blue
Probe
Pestermite
Ninja of the Deep Hours
Mystical Tutor
Ophidian
Legacy's Allure
Brainstorm
Fathom Seer
Rishadan Airship
Rainbow Efreet
Hinder
Gifts Ungiven
Upheaval
Theiving Magpie
Time Spiral
Serum Visions
Mystical Teachings
Fleeting Image
Foresee
Boomerang
Pongify
Dominate
Collective Restraint (5/18/09)
Black
Buried Alive
Black Knight
Zombify
Skinthinner
Dauthi Maurader
Necropotence
Yawgmoth's Will
Ashling the Extinguisher
Kagemaro, First to Suffer
Braids, Cabal Minion
Withered Wretch
Contagion
Phyrexian Scuta
Aphetto Exterminator
Phyrexian Rager
Avatar of Woe
Mirri the Cursed
Grim Harvest
Doomed Necromancer
Plagued Rusalka
Carrion Feeder
Ancient Craving
Smallpox
Undead Gladiator
Cunning Lethemancer
Liege of the Pit
Shadow Guildmage
Exhume
Nantuko Husk
Strangling Soot
Thrashing Wumpus
Xiahou Dun, the One-Eyed (3/17/09)
Massacre (3/17/09)
Sudden Spoiling (3/31/09)
Scepter of Fugue (5/11/09)
Red
Martyr of Ashes
Fireslinger
Avalanche Riders
Skizzik
Mogg Flunkies
Sedge Sliver
Genju of the Spires
Sulfuric Vortex
Brute Force
Reckless Charge
Tribal Flames
Threaten
Arc Slogger
Boom/Bust
Wildfire
Orcish Lumberjack
Thunderscape Battlemage
Browbeat
Rathi Dragon
Pillage
Goblin Cadets
Lightning Dragon
Lava Hounds
Rakdos Pit-Dragon (3/17/09)
Manabarbs (3/17/09)
Molten Disaster (3/17/09)
Green
Cream of the Crop
Harrow
Dryad Sophisticate
Vine Trellis
Deadwood Treefolk
Crop Rotation
Abundance
Overrun
Thorn Elemental
Life from the Loam
Pattern of Rebirth
Moment's Peace
Spike Feeder
Jade Leech
Karstoderm
Thornscape Battlemage
Skyshroud Elite
Jungle Lion
Wild Dogs
Werebear
Verdant Force
Pouncing Jaguar
Tinder Wall
Basking Rootwalla
Hurricane
Mycoloth
Elephant Guide
Artifact
Etched Oracle
Gathan Raiders
Empyrial Plate
Lightning Greaves
Static Orb
Ensnaring Bridge
Phyrexian Processor
Isochron Scepter
Crucible of Worlds
Lifeline
Powder Keg
Darksteel Ingot
Epochrasite
Juggernaut
Aether Vial
Vedalken Shackles (1/17/09)
Metalworker (3/17/09)
Memnarch (3/17/09)
Voltaic Key (3/17/09)
Umezawa's Jitte (5/11/09)
Gold/Hybrid
Balefire Leige
Deathbringer Leige
Hit/Run
Firemane Angel
Armadillo Cloak
Electrolyze
Brion Stoutarm
Murderous Redcap
Prophetic Bolt
Suffocating Blast
Blazing Specter
Stormbind
Goblin Trenches
Fiery Justice
Pyre Zombie
Doran, the Siege Tower
Fires of Yavimaya
Rise/Fall (3/17/09)
Rise of the Hobgoblins (3/17/09)
Iridescent Angel (3/17/09)
Land
Gaea's Cradle
Strip Mine
Stalking Stones
Kjeldoran Outpost
Flagstones of Trokair
Vesuva
Miren, the Moaning Well
