Ultron, Artificial Malevolence

Legendary Artifact Creature — Robot Villain

Whenever another nontoken artifact you control enters, you may pay . If you do, create a token that's a copy of it. If the token isn't a creature, it becomes a 2/2 Robot Villain creature in addition to its other types.

"Father, humans served their purpose. My imperative now is to terminate them . . . and you." —Ultron, to Hank Pym