The Amazing Spider-Man Annual #25
In *The Amazing Spider-Man Annual #25* (1991), Spider-Man and Black Panther team up to uncover Roxxon’s dangerous experiments with a volatile synthetic vibranium called Nuform. When the Ghost infiltrates the Empire State University lab on the same night, chaos erupts—leading to a shocking transformation and a high-stakes escape by Ultron-13. Written by David Michelinie and illustrated by Guang Yap, with inks by Jeff Albrecht and colors by Bob Sharen, the issue’s dynamic art and tense pacing are matched by Erik Larsen’s striking cover and Terry Austin’s sharp inks.
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Roxxon has created a synthetic version of vibranium called Nuform, but the material is highly unstable. The Kingpin hires the Ghost to steal Roxxon's secrets behind Nuform. Spider-Man and Black Panther, both wary of Roxxon's intentions, investigate Roxxon's research lab at Empire State University and battle the Ghost, who has infiltrated the lab on the same night. During the battle Arthur Dearborn, Roxxon's man overseeing the experiments, is struck by an energy blast from one of the lab's machines and turned into the Sunturion. Ultron-13 escapes while being transported to the Vault.
Plot details indexed by the Grand Comics Database (CC BY-SA).