You can either discard it and return it with Hashaton, letting you acquire a busted draw engine for just three mana, or you can play it honestly later in the game and use its self-exile ability to discard cards and enable other Hashaton shenanigans
First up is the mother of machines herself, Elesh Norn
5 An Amazing Extender with Phenomenal Utility Magician of Dark Illusion (TDIL-EN017) Every iconic archetype has a flurry of utility tools, and the "Dark Magician" strategy is no exception
Control and midrange Commander decks particularly appreciate this escalating draw pattern, as it turns unused mana into overwhelming hand advantage over time
It's simply not mentioned unless someone decides to take an action
Later on, you could be making Wurmcoil Engines or Combustible Gearhulks, and if you happen to have a token doubler like Anointed Procession on hand, it will not be difficult to run away with games