In the hit movie,
Batman Begins, the young psychiatrist Jonathan Crane torments his patients with fear, driving them to madness with a terror-inducing toxin and a horrific mask of his own design. When he is given a taste of his own medicine, however, Crane's genius-level intellect crumbles into madness. He dons the mask again and becomes the
Scarecrow, an even more twisted version of his former self who exists on fear and sadism.
This version of the Scarecrow comes with a tank of his fear toxin that he can fire out at unsuspecting Gothamites.