Magic once tried to make an experimental epilogue micro expansion - it didn't end well
Believe it or not, there is a Magic: The Gathering card that's loosely based off of mid-1990s LAN parties.
Once in a blue moon, Magic: The Gathering prints a card in an unusual language.
Revised Edition brought about one of the strangest printing mistakes in Magic: The Gathering history.
Most expansions can't pinpoint a not so stellar reception on a mechanic: But Odyssey can