Curaré is a member of the Society of Assassins, and its deadliest and most infallible killer.
Nobody remembers Curaré's real name, and nobody has seen her face. (The only-- blurry-- photo of her is from an airport assassination.) But everybody knows she's deadly, and possesses an unending knowledge of killer tactics. She is an excellent martial artist, and is designed to kill. She possesses a scimitar that has an edge no thicker than a molecule. It can cut through anything and she often uses it to deflect gunfire. She is Curaré. In the Society of Assassins, the price of failure is death, and Curaré was the first to run afoul of that rule when she finally met her match in the form of Batman and Barbara Gordon. Both of them, working together, managed to capture Curaré and save district attorney Sam Young from her lethal blade. Curaré managed to escape, but then had to face the fatal consequences of her failure. She, however, managed to turn the tables on the Society of Assassins, hunting every one of them down before they had a chance to kill her. She eventually destroyed the entire Society one at a time and can thus be inferred to be the best assassin left in the world.
Curare (spelled without the accent) is also the name of a poisonous plant used by some South American Indians to tip their arrows, and by medical doctors as a muscle relaxant.