3 ring binder card holder Trading Collector's 3-Ring | Hobby Lobby Your precious cards will be protected from all harmful elements MIO Zip 3 Ring Binder

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Could they be related to the little winged creatures found on the sets booster boxes, Illumineers Trove, and logo

What is inside a collector booster Collector booster contents vary by set, but the standard composition is around 15 cards per pack, including: 5 or more cards of rare or mythic rare rarity 9 to 11 traditional foil cards Extended art, borderless, or showcase frame cards At least 1 special treatment card per pack Foil basic lands with premium treatments Specific sets add their own exclusive treatments

Being a creature is an advantage here because you can guarantee its resolution with Cavern of Souls