Butterfly Playing Cards (Royal Purple Edition)Edge marked playing cards provide an advantage that other marked decks can't achieve you can read them without seeing the backs! That means you can find any card in the deck instantly! Butterfly playing cards are the world's most popular edge marked deck. Created by Ondrej Psenicka and designed by Stefan Eriksson, the Butterfly deck is as devious as it is beautiful. In this exclusive collaboration with Penguin Magic, the Royal Purple edition of the