The top opens up and it can hold approximately 90 cards (in protective sleeves), or approximately 180 cards (without protective sleeves)
Honestly, this card is made to overwrite the type of effects that restrict a monster from attacking for activating its effect or when a monster combines many monster's attacks and the others are rendered immobile, but the card says it can, so I guess it can xD, 14 hours ago, Sleepy said: Also noticing "next battle phase" so double battle phase effects like "Weather Report" and "Mischief of the Time Goddess" don't apply
Super Protection-Premium Quality - Our card sleeves binder sheets are high quality, non-PVC and acid-free polypropylene ensures it sturdy and durable,and prevents it from damaging and scratching, protecting your cards
Creatures without flying or islandwalk can't attack
I could see this card making its way into other control decks in the future, and it could keep around the same amount of value until it rotates out