Originally Posted by
SvetlanaSvetlana
Overt speculation leads people to believe that Amon is Bloodbending, but overlook the simple fact that Amon is a master Chi-Blocker.
The scene is simple: Amon dodged Korra and Mako's attacks, and paralyzed them with a few quick jabs.
I personally think that Amon has something to do with Koh the Face-Stealer, because he specifically mentioned the spirits, and is capable of Energybending to a degree that even dwarfs Aang's ability to do so. (Aang needed to call upon the Avatar State to do it) Koh is one of the oldest spirits, and his knowledge is vast. That, or he has something to do with Wan shi Tong. Both spirits are exceptionally knowledgeable and powerful.
I know my theory is nothing more than baseless speculation like a lot of the theories here, but you have to think: Bending is sort of an IDENTITY for people. Who's to say that while he's not stealing people's faces directly, it's more of a spiritual thing, and if they were to go into the spirit world, they'd be faceless. Also, when you see people who've lost their bending, they don't look like themselves. He's not just removing their bending, he's stealing a part of them that renders them into a shadow of their former self.