Iron Lantern
Back in 1996, DC and Marvel Comics teamed up to create Amalgam Comics, where the two companies smooshed their characters together to create all new characters. For example, Green Lantern and Iron Man were combined to create the new armored hero the Iron Lantern! While visiting an alien craft's crash site, Hal Stark suffered a life-threatning chest wound! Using the alien technology from the wreckage, Stark build a suit of armor to keep his heart beating, powered by a lantern-shaped battery. With his new armor, Stark fought off alien invaders and became the Iron Lantern!