Read our technical analysis below to see why this matters for grading
Its just that they are extremely difficult to find, even more so than the Portuguese one

Doc Aurlock Un-Bear-Able Fun Doc Aurlock, Grizzled Genius | Illustration by Jesper Ejsing Commander (1) Planeswalker (1) Creatures (31) Aerial Caravan Alaundo the Seer Archmage's Newt Augury Raven Avian Oddity Battle Mammoth Beanstalk Giant Beanstalk Wurm Beastbond Outcaster Durnan of the Yawning Portal Elusive Otter Fblthp, Lost on the Range Gale, Waterdeep Prodigy Grolnok, the Omnivore Kellan, Inquisitive Prodigy Lier, Disciple of the Drowned Marang River Prowler Outcaster Trailblazer Outlaw Stitcher Patrician Geist Railway Brawler Rootcoil Creeper Rosethorn Acolyte Sage of the Beyond Savvy Trader Skaab Ruinator Slickshot Lockpicker Snapcaster Mage The Foretold Soldier Tlincalli Hunter Visage Bandit Sorceries (17) Aminatou's Augury Bygone Marvels Creeping Renaissance Croaking Counterpart Echo of Eons Lock and Load Make Your Own Luck Mind's Desire Mnemonic Deluge Plan the Heist Quiet Speculation Rise of the Varmints Spectral Deluge Spitting Image Step Between Worlds Tumbleweed Rising Winterthorn Blessing Instants (7) Barrier Breach Behold the Multiverse Cackling Counterpart Choking Tethers Countervailing Winds Oona's Grace Surge of Brilliance Artifacts (2) Abandoned Sarcophagus Sword of Forge and Frontier Enchantments (3) Extraordinary Journey Secrets of the Dead Virtue of Strength Lands (38) Alchemist's Refuge Barkchannel Pathway Botanical Sanctum Castle Garenbrig Castle Vantress Command Tower Dreamroot Cascade Exotic Orchard Forest x12 Hedge Maze Island x12 Myriad Landscape Rejuvenating Springs Simic Growth Chamber Temple of Mystery Terramorphic Expanse The cards that Doc Aurlock, Grizzled Genius prescribes are more varied than you think

I love doing something in the game where I can just sit back and say, "Man, that was cool!" The game I am about to talk about had one such moment
Personally, I dont do this
Mystical Tutor, Enlightened Tutor and Gamble all fall under the limit, and if you've got your Leyline of Anticipation or Vedalken Orrery on the field, you can even mutate Vadrok at instant speed and throw any of a number of counterspells onto the stack