Talk:Bumi (King of Omashu)/@comment-5139306-20120725012814/@comment-27.110.130.130-20120815223340

No one said that bumi can or can't metalbend. But it's frequently emphasized in the series that toph INVENTED metalbending. So toph has the credit.

The dark one is just one of the three students that toph tried teaching metalbending to.