index card binder pages SHANGRLA Large 5x8 and 5x7 Holder with Clear Plastic Sleeves – 90 Pocket A5 6-Ring Binder for Flashcards, Postcards, Recipe Cards – Small Storage Organizer with Sheet and mini organizer notebooks 3x5 Card Sleeves - 2

I know 21 commander damage got decided on due to the original cycle of Elder Dragons having 7 power and you getting hit three times equaled 21 but the book quote is just so fitting for our format

refers to the hardest cards to find in a booster pack

Genetic Apex Mythical Island Space-Time Smackdown Triumphant Light Shining Revelry Celestial Guardians Extradimensional Crisis Eevee Grove Wisdom of Sea and Sky Secluded Springs Deluxe Pack ex Mega Rising Crimson Blaze Fantastical Parade Paldean Wonders Mega Shine Pulsing Aura Paradox Drive Everyday Wonders That covers all of the rarest cards currently available in Pokemon TCG Pocket packs

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