Legion is a demon, and can be found in the Bible in Mark 5:9 and Luke 8:30. (A parallel version of the story can be found in Matthew 8:28-34, but this version does not contain the name "Legion" and tells of two men, not just one, possessed by a multitude of demons.) The story is told that Jesus met a man possessed by evil. This demonic possession spoke to Jesus in a conversation. ...
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Legion also means MANY.
example: the rumors of a cat having 9 lives.
Wow - pretty darn nifty post processing on this one! I'm sure he's not nearly as evil as you portray him here, though. Not based on the kitten picture. :-)