Case of the Lost Witness is a uncommon Enchantment — Case card from Mystery Booster: Commander Edition (MBC), collector number 62.
When this Case enters, conjure four cards named Fblthp, the Lost into your library, then shuffle. Draw a card. To solve — You control a legendary Homunculus. Solved — You may look at the top card of your library any time and you may play lands and cast spells from the top of your library.