You've likely heard of the o riginal Alleyman's Tarot, which is made of over 130 mismatched cards by all different artists. This campaign soon became the highest backed tarot deck ever in Kickstarter history! Decks made up of a melange of cards isn't new but the Alleyman Tarot really brought it into the forefront. There is a group on Facebook that I discovered recently called The Alley where many fans have gathered to swap cards to create their own themed decks which are called Magpie Decks - or Patchwork deck (which I love). I have recently become OBSESSED which doing this myself and have already started to trade a buy individual cards.
This is also a great way to collect your fav cards from your fav decks that you may not have been able to get a hold of. Or are special/rare like this Lovers card of Matthew Ryan Cohn and his wife Regina Marie Cohn that I got from the Oddities Flea Market in Chicago this year.