Over the centuries, he has been responsible for the couple's murder in many different incarnations, and during the World War II era, he was reincarnated as the evil Doctor Anton Hastor. Hawkman and Hawkgirl were reunited when facing Hastor and then, eventually, they managed to foil his plans -- though of course, Hath-Set would try again over the years.
In 1941, Hastor had kidnapped various prominent scientists and pooled their collective resources in order to build a flying mechanical eye airship, with weaponry capable of leveling whole cities. His plans for world conquest were foiled by Hawkman along with his colleagues of the All-Star Squadron.
During the 1980's, when Infinity, Inc. took place, Hath-Set used the curse he'd put upon the Hawks to take control of their son Hector Hall, the Infinitor known as Silver Scarab, and with him attacked the team. Luckily, they managed to defeat the evil priest, but at the cost of Hector's life.
Today, Hath-Set exists in a spiritual form, and has been able to take over the bodies and minds of his many descendants, most recently being a woman called Helene Astar, while Hawkman and Hawkgirl were travelling to the Himalayas to search for Speed Saunders. It was thought that Hath-Set had been reincarnated as Astar who died when attempting to kill the Hawks herself. But what really happened was that the priest possessed Astar and by letting her die, he succeeded in misleading the Hawks into thinking Hath-Set had also died for good.
Hath-Set currently plots with the crooked businessman Kristopher Roderic to kill his archnemesis|.