Batman Superman (Vol. 2) #20

The Man of Steel and the Dark Knight need time to recover from their manic melee through the Archive of Worlds, but the heroes wont rest for long! Despite the efforts of new friends El Diablo and Alanna, Auteur.io, the cybernetic architect of these alternate realities, seems to have the upper hand! And to make matters worse, the Archive of Worlds unleashes its most horrific story ever put to magic-infused celluloid: the dark and twisted tale of that demon from the depths: Etrigan!