Command

The Command zone is a zone used for special objects which affect the game like permanents do, but are not actually permanents. This includes commanders, emblems, planes, phenomena and schemes. Many Commander sets, such as Commander 2013, Commander 2017, and Commander Legends, as well as Conspiracy sets, contain cards that interact with the Command Zone.

The Dungeons & Dragons: Adventures in the Forgotten Realms set introduced the dungeon type. These cards start to the sideboard and when an ability instructs you to venture into the dungeon, you place it in the command zone and stays there until it is completed. You can only have 1 dungeon card in command zone at a time.