I even designed a top-down card to represent the Sphere Grid
This card doesn't start in your deck but in a special "Command Zone." You can cast your commander from this zone, and if it would die or be exiled, you can return it to the command zone to be cast again, though it costs an additional two mana for each subsequent cast
This is another card I have a single copy of for my collectionI acquired it from Card Kingdom for something like $50 just a few months ago
Unlike SCG, which can say were charging $10 for this card and thats that, the TCG price on newer cards just keeps dropping and dropping, often until its nearly at parity with buylist prices
Both of these Locations don't have a unique ability, but they ease the player into using them by being cheap, ink cost-wise, while also gaining you one lore at the start of your turn, so long as the locations stay on the field
You can see examples above with Glaceon and Arbok