Surly Badgersaur gives us a treasure each time we discard a land, making it much easier to balance the decision making involved in getting land drops or discarding lands
Mechanically, Terra is a fascinating card, using the mill mechanic of Black decks while still allowing players to build into the burst power of Red and creature-creation of White
To prepare this 2/3 with vigilance, you need to attack with two or more creatures
Even as someone who isn't necessarily interested in competing in the game, simply owning them might be enough to entice collectors
And it might be even better in Commander
The Planar Chaos design team of Bill Rose, Mark Rosewater, Matt Place and myself were sitting in a room, and the first order of business was figuring out what "alternate reality" means to Magic