Talk:Meta-Teaching/@comment-5693502-20180814003438/@comment-24053170-20180814015352

The deal with Yakone teaching Bloodbending isn't the problem.

The problem is that he taught others to do bloodbending without the assistance of the full moon, which is considered impossible as you simply can't do it without the augmentation provided by it.

Even the Avatar themselves can't bypass that restriction.

So he counts as a user simply because he did something that can't be done.