Ultron Unlimited: Part 2 of 4. "This Evil Unfolding!" Guest-starring Black Panther. Story by Kurt Busiek. Art by George Perez and Al Vey. One of the Avengers' deadliest adversaries has just committed an atrocity unparalleled. The mechanical monster just eradicated the population of an entire nation. Now, Earth's Mightiest Heroes must spearhead a UN assault force to try and take down the creature known as Ultron.