Dr. Thaddeus Sivana is a fictional character from the DC Comics universe, primarily known as an adversary of the superhero Shazam. He is depicted as a brilliant but morally ambiguous scientist who seeks to gain magical powers to prove his superiority and achieve his goals. Sivana's character often embodies themes of ambition and the consequences of unchecked desire for power. He is portrayed as a complex villain, using his intellect and technology to challenge Shazam and his allies, making him a significant figure in the Shazam storyline.