It just has to have at least one card in it, and you don't know the contents before opening it
$3.49 The Regalia Final Fantasy $0.49 Gilgamesh, Master-at-Arms Final Fantasy $0.79 Choco, Seeker of Paradise Final Fantasy $1.99 Machinist's Arsenal Final Fantasy $0.49 Sazh Katzroy Final Fantasy $1.99 Vincent Valentine Final Fantasy $0.79 Hope Estheim Final Fantasy $0.49 Firion, Wild Rose Warrior Final Fantasy $0.49 Sin, Spira's Punishment Final Fantasy $1.49 Ardyn, the Usurper Final Fantasy $0.49 Jecht, Reluctant Guardian Final Fantasy $1.49 Squall, SeeD Mercenary Final Fantasy 0 results found
There are a ton of good articles out there about this format, and one of them highlights the insane nature that we, as a community, never played this deck into the throngs of Zoroark decks
Of course, there are stories of this thing completely changing the game, but in general, there is usually enough enchantment removal floating around that most of the time this will probably do nothing (expect possibly draw out that enchantment removal, but you dont usually want to approach the game like that, especially in multiplayer)