[He shifts a little guiltily when Korra has to explain that she's from another world - he should have done that, but he had been too concerned with bickering with Ed about coming out in the snow.]

I know it sounds crazy, Brother, but I believe her. I think this has something to do with a portal, but... I don't know how.

[Not Truth, he knows that much.]

How does bending work? Where do you pull the power from if you don't use any kind of transmutation circle?