Maleficent Monstrous Dragon is at the top for a couple of reasons: she has a harder pull rate, her artwork is remarkable, and she can easily banish one card as soon as it is played
The name works on multiple levels, as it is both literally a trading card, and also has the ability to trade its text box with another card on the field
Unfortunately, it lets the controller separate the piles, not the opponent, so the split often favors the Toymakers controller regardless of your decision
At the beginning of combat on your first turn, Ezuri's ability triggers, and you can put at least five +1/+1 counters on a creature
Wheel of Fortune is the card the whole archetype is named after, but it's quite pricey and most people can't afford to run one in their decks
The adventure portion, Petty Theft, is a highly efficient removal spell Two mana to bounce any nonland permanent at instant speed is a very easy answer to many problems