Knowledge Exploitation How many cards can you name that let you search your opponents library
The answer would be $25,000 for the one graded 10 by PSA, as there are only 18 of them in existence right now

Baron Bertram Graywater Barrow Naughty Barrowgoyf Basilisk Collar Basri's Acolyte Basri, Tomorrow's Champion Batterbone Batterskull Battlegrace Angel Behemoth Sledge Beloved Princess Benalish Partisan Betor, Ancestor's Voice Bishop's Soldier Black Panther, Claws of Bast Blacklance Paragon Bleeding Effect Blessed Defiance Blessing of Belzenlok Blood Baron of Vizkopa Blood Burglar Blood Glutton Blood Operative Blood Poet (playtest) Blood-Cursed Knight Bloodline Necromancer Bofur, Reliable Guardian Bond of Discipline Bonepicker Skirge Boon-Bringer Valkyrie Boot Nipper Boros Mastiff Brave Brawler Bre of Clan Stoutarm Breathless Knight Bretagard Stronghold Brightblade Stoat Brightling Brion Stoutarm Brisela, Voice of Nightmares Bruse Tarl, Boorish Herder Bruse Tarl, Boorish Herder Butcher of the Horde Butcher's Cleaver Butcher's Glee Cabal Initiate Caduceus, Staff of Hermes Cairn Wanderer Call the Bloodline Call to the Feast Captain America, Steve Rogers Captain Marvel, Earth's Protector Caravan Hurda Cartouche of Ambition Case of the Gorgon's Kiss Cat Cat-Gator Cavalier of Night Cecil, Redeemed Paladin Celebr-8000 Celestine, the Living Saint Champion of Arashin Champions of Tyr Chancellor of the Dross Changeling Hero Charismatic Conqueror Charity Extractor Charmed Stray Child of Night Chromanticore Circle of Power Citizen V, Helmut Zemo

Each booster pack has 12 cards each, which starts budding Illumineers off with 48 cards