Apart from the 6 basic lands, a Commander deck may not contain double cards and in the card choice for the deck, you are also limited to the colors of your Commander
Transforming After a double-faced card transforms, it's still the same card, so any Auras, counters, or other effects stay right where they are (unless the double-faced card's characteristics have changed such that an Aura can no longer legally enchant it)
But unlike his Elder, Shigeki can do this trick over and over again and once youve milled and ramped enough, he can regrow all the best spells from your graveyard to help turn the corner
In total, we have four lands that let us get in with Obeka: Access Tunnel, Escape Tunnel, Rogues Passage, and The Black Gate
As you can see, the pattern is pretty consistent
Some characters even have special abilities