It's a showdown at Castle Frankenstein with the souls of Berlin on the line as Hawkman, Neon and Firebrand battle Onimar Synn to possess the unstable Nth metal isotope. Plus, June Robbins' secret rescue plan features the whirlwind reveal of a hero from DARK NIGHTS: METAL, not to mention the most important tombstone in the DC Multiverse! Prepare yourself for a shocking last-page reveal, which goes to a place not seen in the DCU in over a decade.