Theyve evolved a lot as a product over the last decade, and were finally reaching the point where custom sleeves are in arms reach of the average consumer
These cards are usually banned from play in those formats, and you can find more information on which cards are banned in which formats and for what reason here
It has common disruption Pokmon like Weavile and Sableye, and staple disruption trainer cards in Crushing Hammer and Lost Remover
Sure, youre only able to reanimate the top card of your graveyard, but thats fairly easy to manipulate, so it shouldnt curtail too many of your plans
But when you add in the 2.5 million as the number of packs, then we get the approximate number of copies out thereand thats illuminating indeed
Its playability in competitive decks gives it staying power, while its holofoil design makes it a neat addition for collectors