The method he used to travel between planes is also a mystery
Dimir is one of the 10 guilds from Ravnica, each associated with a color pair
Eight of these are "clubs," each of which has a "master." The other areas are Mason's Lab (starting area), Ishihara's House, the Challenge Hall, and Pokmon Dome (final area)
The spirit is another card slotting into Commander decks with a chance to perform in other MTG formats
Its super powerful, has an excellent commander who will absolutely reshape the casual EDH meta, and offers nearly triple the MSRP in value across a dozen or so cards
It is also at this stage that other variants of the file are created to support digital expressions such as marketing, web, and Gatherer