You can’t teach an old dog new tricks. That’s what everybody says, and that should be true for the Avatar. But she isn’t old. She’s 21 years young and now suddenly, on a full moon, can blood bend.

You’re sparring with her until she accidentally blood bends you. Her eyes grow wide as she recognizes what she has done and gets a wave of PTSD from Amon

“What the hell—?” She sputters in shock before stopping the technique. She backs off instantly in self inflicted horror.