Storm is a superhero appearing in American comic books published by Marvel Comics. Created by writer Len Wein and artist Dave Cockrum, the character first appeared in Giant-Size X-Men #1. Descended from a long line of African witch-priestesses, Storm is a member of a fictional subspecies of humans born with superhuman abilities known as mutants. She is able to control the weather and atmosphere and is considered to be one of the most powerful mutants on the planet. Storm is a member of the X-Men, a group of mutant heroes fighting for peace and equal rights between mutants and humans. She was the most prominently featured X-Men character in the 1980s, at which time it was the best-selling comic book in America. During this decade, she also acted as the acknowledged leader of the team.