The Sinister Society is the Amalgam version of Marvel's Sinister Six and DC's Secret Society of Super Villains.
 
The Sinister Society was formed of the creations of Will Magnus. They were all robots and cyborgs who had their lives changed by Magnus and swore to make him pay for what he had turned them into. Quasimodox and Chemodam lead the team as intellectuals while the remaining members carry out the field missions.
 
The Sinister Society was able to defeat and capture the Magnetic Men. They wanted to learn how they too could change back into human forms. Magneto interfered but they all soon learned they had a common enemy in Will Magnus and joined forces.