Ultron, Unlimited

Legendary Artifact Creature — Robot Villain{1}{U}{B}2/2

Flying Whenever Ultron attacks, he connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.) Whenever a creature you control connives, you may pay {1}. If you do, create a 2/2 colorless Robot Villain artifact creature token.

Colour identity Dimir · Flying, Connive · Commander page

In short

Ultron, Unlimited has 3 listed printings; the most valuable is the Surge Foil printing from MSC at US$5.55 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.

Every Ultron, Unlimited printing

Surge Foil