The Anti-Monitor then released a massive antimatter wave, absorbing the energies of the destroyed positive matter universes and growing stronger even as his counterpart grew weaker, and employed the second Psycho-Pirate, using his emotion control powers to terrorize the populations of the planets he sought to conquer and destroy.[citation needed] The Monitor, along with his aide Harbinger, gathered a group of heroes and villains from various alternate universes in order to combat the threat of the Anti-Monitor.[7] One of Harbinger's duplicates was taken control of by the Anti-Monitor and apparently killed the Monitor, but the Monitor was able to use his death to create a pocket universe to contain the remaining realities from the Anti-Monitor's attack.