Equinox is an African-American youth who gained superhuman powers due to accidental exposure to his father's malfunctioning equipment after a lab accident.
Equinox's powers were similar to the heroes the Human Torch and Iceman, with whom he first battled. He also came into conflict with the superheroes Spiderman, Yellowjacket, and the Wasp, during which his origin was revealed, the three heroes managing to apparently cure him using technology conceived by his mother and constructed in the Baxter Building while the FF were away.
Years later, he fought Falcon.
Equinox appeared during the
Civil War event and when the registration law was announced, he wanted to leave the country again. He contacted Vienna to make him a new fake identity, but he did not know Vienna was secretly working for the Heroes for Hire, who later apprehended Equinox and several other super villains.
During the
Secret Invasion storryline, Equinox was revealed to be a Skrull infiltrator and attacked his teammates. The Skrull-Equinox not only had the abilities of Firestar and Iceman to match the real Equinox' powers, he also had some of Spider-Man's abilities. He froze Hardball, Ryder and Riot in ice and broke the glass over Think Tank's brain. The Skrull-Equinox was sniped in the head by Cloud 9 using adamantium bullets.
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