yugioh card container UAONO Deck Box for MTG, 100+ Deck Case with 2 Dividers, PU Leather Storage Box, Compatible with Collectible Trading Cards (Black & Red, Sky Dragon) : Toys & Games It holds two fullsized decks Anqtovp 1 Case 11.5x11x5 inch

I know of two more cards, one is 143a/236 from Cosmic Eclipse (from the Small but Mighty collection box) it is also available in Japanese from sm12a 186/173

One option Wizards may consider if things really get bad is some sort of trade-in program

Protector Dimensions: 4.85h x 5.9w x 2.6d

Bargains include dog hats, chair protector socks shaped like cats plus loads of useful household items like glasses repair kits or USB connectors and yep, they also sell lots of sublime stationery and pretty pencil cases

Turning off countermagic is huge in the format, since most games tend to devolve into counter wars when it comes time for someone to win