Keep in mind that not every MTG card has an ability
The greek boys used to stand at the top of group hug commanders, and theyre still a very good choice if you dont mind missing out on Black cards
You can use it to politic with your opponents as you can help fix their mana if you choose one of their lands
Like most Magic: The Gathering cards, the value of Clown Robot depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Unfinity Tokens)
This is what the original Atraxa precon does, in fact
As I write this, the cards of Coldsnap have recently been revealed, which includes a card that can create a token that weighs in at an astounding 20/20, making it bigger than George Foreman and all of his kids combined