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Invented to symbolize the Werewolves in original Innistrad changing from Humans to wolf-monsters and back again, the cards represented a massive leap into previously unexplored design space

Durable Hinge Lid: The lid opens and closes with a sturdy hinge for secure storage.Spacious Storage Space: Provides ample room to organize and store your collectible cards and accessories.Vibrant Card Artwork: Features eye-catching card artwork and graphics that showcase your collection.Trusted Brand: Manufactured by Konami, a leading brand in trading card games and anime.Rectangular Shape: Sleek rectangular design conveniently fits into drawers and shelves.

Then, some cards play into this by giving you special bonuses for having modified creatures

The downside to these cards is that, if they're knocked out, your opponent gets to take two prize cards rather than one