Batman: Sword of Azrael #4
Azrael. Batman. The demon Biis…their three-way conflict ends in a fiery cataclysm beneath an oil refinery in the Southwestern USA. What emerges are two new allies, separated by a shadow of violence, bound by a shared secret…the identity of the man behind the Dark Knight's mask! The conclusion to this miniseries leads into Batman (1940) #488.