There are approximately 29,000 unique card names in paper, but including all reprints, foils, alternate art treatments, and non-English versions pushes the number past one million individual printings worldwide
Every card is inspected individually, and you receive a detailed quote
Decks that play their opponents' cards are great for adjusting to the power level of a table because you really are at the mercy of what your opponents bring
Of course, the majority of opponents have Karn, as well, so fighting over Karn is a big part of the game
(Mana abilities can't be targeted.) When this creature enters, counter up to one target activated or triggered ability
Battles are good, especially if you get decent value out of the front card and see the transformed side as extra