Doctor Polaris

Created by John Broome and Gil Kane, Doctor Polaris first appeared in Green Lantern #21 (August 1963). In canon the first and primary bearer, Neal Emerson, is a scientist who gains (or absorbs) magnetic energy and thus the ability to manipulate magnetism; his Polaris persona frequently manifests as a darker split-personality that commits crimes. Over decades Emerson appears in solo conflicts with heroes (notably Green Lantern) and in group villain settings; in one storyline Emerson sells his soul to Neron (Underworld Unleashed) for increased power. A later bearer, John Nichol, adopts the Doctor Polaris identity and exhibits similar magnetism-manipulation powers with some differing applications in modern storylines.

Sources describe Doctor Polaris as a costumed comic-book antagonist with a magnetic motif; visuals vary across publications. Neal Emerson is presented alternately as a scientist and as the costumed 'Polaris' persona, with narratives emphasizing a distinct personality/guise for the villain. Specific, consistent costume details (colors, emblem) are not reliably described in the supplied sources and change between appearances and media adaptations.

Both incarnations are described as able to generate and channel electromagnetism naturally or artificially: lifting and controlling heavy metallic objects and ferrous particles, sensing nearby metals and determining their distance, projecting magnetism-related energy forms, flying at subsonic speeds, and altering large-scale electromagnetic conditions (stories state he can manipulate metals within the Earth to produce earthquakes, volcanic eruptions, or other disasters). The Neal Emerson version exhibits a split-personality dynamic that drives many of his crimes; the John Nichol version is described in summaries as able to create localized magnetic storms affecting human brains. Narrative methods of augmentation (for example, selling his soul to Neron or receiving augmented powers in animated adaptations) are also recorded in the sources.