While the front side is good enough to see play on its own, the fact that it only has four defense counters makes it relatively easy to flip (a single Sheoldred, the Apocalypse attack gets the job done), and the backside offers a very powerful creature that can defeat a battle or kill a planeswalker each turn while potentially generating card advantage as well
It's a card that snowballs if not answered, and why it's such a good card
Its one of the best aggressive two-drops printed in a long time but has been without a reasonable deck to call home so far
Collar, meanwhile, is best friends with Judith, the Scourge Diva and Walking Ballista
Urzas Legacy also introduced foil cards to Magic , and while those cards are worth an absolute boatload, this list will be ranked by the market price of the non-foil versions, for consistencys sake