The Calculator plans to exact his revenge on Oracle by first unleashing a nanovirus upon the citizens of Gotham. What does that do, you ask? Well, it’d turn everyone into mindless techno-zombies. Doesn’t sound like much fun, eh? For phase two of his plan, the Calculator plans on eliminating everyone close to Oracle – including Batgirl. BATGIRL #10, courtesy of Bryan Q. Miller and Lee Garbett, hits 5/12.