(W) Gail Simone (A) Vicente Cifuentes, Alitha Martinez (CA) Ardian Syaf, Vicente Cifuentes. * The beginning of the three-part KNIGHTFALL* and the introduction of a villain destined to become Barbara's greatest and most dangerous foe. * An innocent woman who was sentenced to life in ARKHAM ASYLUM* Knightfall is now free and more dangerous than the psychotics she was imprisoned with. Her bloody quest for revenge will be unlike anything Batgirl has ever seen.