35pt Magnetic One Touch Card Holder Clear, Acid Free & UV Protected For Pokemon, MTG, Yugioh, Baseball Cards Baseball Sports Trading Cards According to SolemnYugioh, these card holders can cause damage long term. I was wondering if anybody here has experienced this happening to their cards and what alternatives there are for storing sealed cards. : Amazon.com: 24 ct Magnetic Card Holder, 35 pt Hard Plastic Card Protectors Top Loaders for MTG, YUGIOH, Sports Cards : Toys & Games 50ct Magnetic Card Holders 35pt for YGO Cards,MTG Cards,Baseball Cards,Sports Cards,OPCG Cards,DTCG Cards Storage and Display : Toys & Games Amazon.com Amazon.com: CARDDICT 25ct Magnetic Card Holder Compatible with Trading Cards, 35pt One Touch Card Holders, 2 1 2 x 3 1 2, Rigid Magnetic Card Case for MTG, Yugioh, Baseball and Sports Game Cards : Toys