>>101990402Should have had real bending blocking powers and taught it to several different people. He should have been a metaphor for the spread of ideas. They can stop him, but others know how to take bending away. The only way to get them to Not is to convince them that they have nothing to fear from benders.
This would have given Kora a goal to solve that challenges her to be the Avatar and symbol of peace rather than a meathead bitch.
