The Swarm has got to be one of the best villains to come out of the comics medium. He was a scientist in the Nazi Party who, experimenting with radioactive mutant bees, was devoured by them. Somehow, this transferred his consciousness to the swarm. So he's literally a hive of bees who believe in National Socialism. Why bees would feel passionately about human racial distinctions is not clear! However, he builds giant robot bees to do tasks for him, and that makes it all better.
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