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You can see a review of the Prime X4 XL courtesy of Tolarian Community College below:

What Are Enchanted Cards

On top of finding standard foil versions of cards, you might also chance upon Lorcanas incredibly rare Enchanted cards - special variants that feature borderless designs, brand new artwork and a holographic rainbow effect

There were also many other artworks revealed for future MTG cards, specifically for the new fairy tale inspirations of Wilds of Eldraine, as well as a few teaser-level images from The Lost Caverns of Ixalan (the design and lore of the set was actually the very first topic of the panel)