Spoiler
Amon is really tarlok's brother, yakones son and he uses blood bending to take away bending. It isn't meantioned how tho. pretty awesome just finished watching it. I thought how could they end it better then the last airbender finale but they delivered. It was jaw dropping

my god! amon was really bacon face the entire time!? how did we not see it earlier!?

I was thinking maybe Amon was Pabu living a double life........

dont you mean amoff?

With make-up.