megalomaniacal (adjective)

1. The megalomaniacal cult leader believed he was a divine messenger and demanded absolute obedience from his followers.

2. In the fantasy novel, the megalomaniacal sorcerer sought to conquer the entire realm and rule as an all-powerful tyrant.

3. The villainous character in the cartoon series was portrayed as a megalomaniacal mad scientist, constantly plotting to take over the world.

4. The anime antagonist possessed megalomaniacal tendencies, believing he was destined to become the supreme ruler of the universe.