The whole Metro USB subplot: Really an extremely powerful artifact from long ago, used by an iteration of Ethan (possibly even the first one) to wipe everyone's (including the Exalted Ones and Creator's) memories. The Watcher was not immune to this, or the Turtle of Power, the original successful meme god. They had programmed the USB to seek out Ethan and slowly give him back his old memories, so that one day, the MANCM's final iteration would be able to defeat the Exalted Ones for what they did to humanity, and so many other species, in their endless quest for...

Mega-Fortune-Pudding-Pot: A bowl in Joe's lab, put a spoon in and take a bite; it gives you foresight into the future or clears your mind to show you old memories clearly. This thing can even restore sanity, not that it was ever used for that. If the pudding is all eaten, the bowl will lose its powers and become normal again. (Not to be confused with the Dreamscope (not always capitalized) or Blender)