Part of the DC/Marvel mashed-up Amalgam universe. The Magnetic Men are a mash-up of the Brotherhood of (Evil) Mutants and the Metal Men.
This issue has variants:
Mister Mastermind; Magnetic Men [Nickel [Lance Vale]; Bismuth [Snapper Jones]; Antimony [Debbie Walker]; Iron [John Henry Steel]; Cobalt [Lucius Richmond]; Sinister Society [Soniklaw; Kultron; Vance Cosmic; Deathborg; Black Vulture]; Doctor Will Magnus (Magneto's brother); Quasimodox; Chemodam
Synopsis
The Magnetic Men battle the Sinister Society, whilst Magneto travels to Krakoa, the Living Dinosaur Island to search for his brother's secret base.