a Pokmon card with the back of a Magic: The Gathering card
If you run one of these commanders, you may need to have a Rule 0 discussion with your pod before you play your deck: Generally, these are commanders that most players don't want to play against at, say, Bracket 2, as Commander Format Panel member, Gavin Verhey puts it
Aether Revolt have different takes on typical mono-colored abilities, from Yahenni, Undying Partisan's indestructible sacrifice to Baral, Chief of Compliance combining the looting ability to draw and discard with the instant and sorcery loving of a control deck
Without the CGC Trading Cards Registry, I would still be using my Excel sheet with checkboxes next to each sets card numbers
This is similar to the capabilities of Scapegoat, but faster since it gives you two more monsters and is usable on your turn