Society of Assassins

The Society Of Assassins was a secret group of people who take on any job to assassinate a targeted individual. However, anyone who failed to kill his/her target becomes hunted by the Society. However, not one member had failed, except for one, Curaré, their most effective assassin, due to the intervention of Batman. But instead of being hunted, Curaré stuck back and began to hunt down her former comrades one by one, hitting each of them with a chemical that wiped their minds.

Batman Beyond

 * "A Touch of Curaré"
 * "Final Cut"