fully healed from Moonstone's attack—and Songbird became allies and lovers. Civil War: Hero Hunters The new Thunderbolts engaged and defeated Quicksand in a battle in Denver during the early days of the superhero Civil War. After this, they were summoned to Washington where they met with Iron Man, Mister Fantastic, and Yellowjacket. The three heroes, all supporting the Superhuman Registration Act, informed Zemo that they wanted the Thunderbolts to hunt down supervillains and recruit them to the Pro-Registration cause, which would be their chance at redemption. Unknown to Iron Man, the Thunderbolts had been doing this in secret for three weeks. Zemo's "Thunderbolt Army" grew rapidly, the team vastly expanding. It now included dozens of other supervillains, including most notably Doctor Octopus, the Wrecker, and Ox. The new team dispersed to battle super-villains, capture them and offer them a choice: join the Thunderbolts or go to prison. Of course, they all chose to join the Thunderbolts. Baron Zemo convinced Captain America not to stop him from battling the Grandmaster, while Nighthawk was revealed as being a spy for the Squadron Sinister inside Captain America's Secret Avengers. Zemo then informed Songbird that in the coming battle, he knew that she would betray him, which she had been planning to do all along, in revenge for his killing of Photon, and he would sacrifice himself to save the world. Zemo then saved the Wellspring of Power from the Grandmaster, who planned to use it for his own ends. Believing that all of his visions were subject to the flow of time, and that nothing was set in stone, Zemo defeated the Grandmaster, and boasted to his teammates that the power was now all his and theirs. He insisted that he would use it to help the world, despite the consequences for doing so. Songbird, who had temporarily lost her powers during the final battle, was told by Zemo, "now is when your betrayal would have come." The vision of her betrayal turned out to be somewhat correct after all, though. Although she could not use her super-sound, Songbird used a simple opera note to crack the moonstones, sending Zemo into a whirlwind of cosmic time/space. In his final words before he was completely sucked into the vacuum, he screamed out that he would never have hurt a world he worked so hard to save. Some of the Army of Thunderbolts, consisting of