Supply and Demand We all know that the market forces, supply and demand, decide over the price of a certain Magic trading card
From what I could find, the Grand Prix cards are about 26x36 foam boards and are available in different languages
That activated ability can be absolutely criminal, whether you use it to finish someone off or just to bring them down a peg
Fires decks could have a terrible time with the Cloak when it was on something as simple as a River Boa even when it wasn't going on something even larger like Rith, the Awakener, but Saproling Burst and Blastoderm caused compatibility issues
Beyond that go for faster lands Sanctum of Ugin, Ancient Tomb, Eye of Ugin, better ramp Mana Crypt, The One Ring for draw, the Eldrazi Titans (all), Conduit of Ruin, Void Winnower, Portal to Phyrexia, okay I'll stop now
That creature's controller loses 1 life for each unique vowel in the creature's name