There are many sick individuals on this list, but the KGBeast might just be the most twisted and horrifying of them all. An assassin trained by the KGB, his primary targets in the DC universe are Batman and his allies. KGBeast has proven that he will stop at absolutely nothing in order to take them out. His first assignment, though, was to kill 10 key US officials to prevent the Star Wars program from being completed. This was Batman's first encounter with the Russian monster, but the Dark Knight was unable to prevent him from killing practically all of the targets (and, indeed, from taking out 100 civilians at the same time). When Batman finally confronted him, KGBeast chopped off his own arm rather than be captured - showing just how badass and committed to his job he is. He then replaced his arm with a huge cybernetic gun, just to amplify his awesomeness. KGBeast was eventually killed by an unnamed contractor (possibly either Two-Face or Great White Shark), which prevents him from being placed higher on this list. But he is a seriously twisted and evil figure, and his refusal to differentiate between potential victims makes him one of the most feared contract killers in the DC universe.