megalomanic (adjective)

1. The super villain in the comic book displayed megalomanic tendencies, constantly striving for world domination.

2. The megalomanic character in the cartoon series believed that he was the most powerful being in the universe.

3. The protagonist in the novel had a megalomanic personality, always seeking to control and manipulate those around him.

4. Throughout history, many dictators and rulers can be described as megalomanic for their desire for absolute power and supremacy.