If you laid out your deck and put every card with the same mana cost in a separate pile, lowest cost on the left and highest on the right, it should form a neat curve that peaks somewhere in the middle
I suppose it was inevitable that after making decks for the Joker and the rest of Batman's rogues gallery, I would end up building the decklist for the Dark Knight himself
Green has very few six drops that it wants to play and so if nothing else Prime Time is an important curve smoothing card
Best of all, none of his abilities are tap abilities, so if you have an ability that triggers off creature death and enough mana, you can take out your opponents by sacrificing and remaking a Saproling over and over
Some of these add new looks to classic lands, like Plains or Mountains, with some special vertical borderless layouts
As you can see, she has two +1s