For 10 points, name this frequent enemy of various DC superheroes, an immortal villain.
During a stint in the French court, this character used the royal family for syphilis experiments. This character betrayed Mordu the Merciless while a member of the Demon Knights, and his archenemy was replaced by the Resurrection Man. This character founded the (*) Injustice Society, in addition to being part of various other evil organizations like Taratus and the Secret Society of Super Villains. This character bathed in the radiation of a meteorite while still a Cro-Magnon of the Blood Tribe. This villain has appeared throughout history under names like Alexander the Great and Genghis Khan as a master tactician hellbent on world domination. For 10 points, name this frequent enemy of various DC superheroes, an immortal villain.
During a stint in the French court, this character used the royal family for syphilis experiments.
Vandal Savage (prompt on partial; accept Vandar Adg; Writer’s note: also prompt on *deep breath* Khafre, Alexander the Great, Julius Caesar, Genghis Khan, Vlad the Impaler, Jack the Ripper, Burt Villers, Cain, Licinius, Blackbeard, Adolf Hitler)