#133: Zatch Bell
Start off with Birds of Paradise, then Sakura-Tribe Elder, Three Visits, or Rampant Growth, then Cultivate, before finally hitting the big leagues with Migration Path and Vastwood Surge
(Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Threshold This creature can't be blocked as long as there are seven or more cards in your graveyard
Cards that care about the number of card types your cards have are also worthwhile, including delirium cards
The cards in your graveyard should always be face up, and anyone can look at them at any time
This will also make my job in making blanks much easier because now I wont have to worry about making tons upon tons of minor variations, or worse, decide that maybe a variation is NOT worth making only to find out that someone wanted to make a card using that variation