[Aang came here from later on, so he still knows how he solved this problem from memory; but it's a crisis that came about later which Ikki was able to spoil the solution of.]

Yeah. I was able to find another way. I almost did do it. I was ready to execute him, but I stopped at the last moment. I couldn't go through with it. Instead, I used... a special secret technique to take away his power. Then he just became... a normal prisoner.