There were 4 villains to take the name Syonide. The 1st was an enemy of the golden age Wonder Woman. The 2nd was a hit-man for hire who worked for Tobias Whale and who clashed with Black Lightning. The 3rd also worked for Whale and was Halo of the Outsiders's nemesis. The 4th was a woman named Nikki who was part of Lady Eve's Strike Force Kobra, fought Looker and Eradicator of the Outsiders, and was her teammate Fauna Foust's girlfriend.