Every 100 card deck in this format must have at least one card that you nominate as its main character: the eponymous commander
If theres no golden circle around a characters cost, they are only a character card, and cant be played for ink
Considering the many other impact cards, youll play this for redundancy in Commander decks that ping or in rarity-restricted decks and Cubes
When played (without expending mana), the Mox Emerald grants one green mana per tern
By itself, you'll minimum earthbend 2 with the Food it gives you, but you can earthbend so much more for just 2 mana in the right deck
This color intensive rare only sees play in Commander, and the reason to consider grabbing one is that the price can only really go up until it gets reprinted which considering we got it on the Enchanting Tales bonus sheet, might not be for a minute