The 'Best' version is made of cards from all four Lorcana sets, including legendaries
While there are cards that turn your lands into creatures, like Jolrael, Voice of Zhalfir, or anything with the awaken mechanic, Im only considering lands that turn themselves into creatures for this article
Unlike many planeswalkers the ultimate on Ajani creates a secure lock on the game, and thanks to the protection Ajani's ability gives, it is practical to get there even against decks capable of attacking
Compare that to Mystery Booster 2, a set Wizards is so uninterested in selling to you that it won't even let you buy it
With a decent ink cost, its easy to play and thus justifies its lack of any special ability in order to provide maximum value
Zippered closure to keep collectibles safe and intact at all times