We know bending originates from the Spirit World and nature. So dragons teach people fire-bending through a dance and Sky Bison somehow taught Acolytes how to Air bend way back when.
Then there are things like The Lion Turtle, which is an older, spiritual animal that can pass on energy bending.
That being said, there might be a mischievous spirit changing the rules of bending overall so a non-bender like Amon can take away bending and Tarrlock can blood bend without a full moon.
I dunno. We should ask during a solstice.
OH YEAH – THE BOOK ONE FINALE AIRS 3 DAYS AFTER THE REAL SUMMER SOLSTICE GUYS. : )
I bet it’ll be Spirit World time.
