The sheer flexibility of netting not only the best card in your deck for the situation but the top two cards is awesome
In a much later environment after the release of this card, the Jar series, which excludes a large number of cards with face-down markings, such as the Jar of Graduation and the Jar of Humility, has been consistently used, and even though the adoption rate is lower, there have been many cards that require exclusion of many cards, such as Artisan - Orochitron , so if the opponent uses such a card, it can inflict reasonable damage
Players often ask Whats the best method to hold and store multiple EDH decks?
Kardur, Doomscourge can be your forced combat commander
Shuffle up to 3 "Phantoche" monsters from your Graveyard into your Deck
Two example of these are Mask Change and Mask Change II, both of which are Quick-play