Hundun fought against an incarnation of the Avatar and lived in the Spirit World ever since then. After the Harmonic Convergence, he entered the physical world and began pursuing his goals of bringing chaos to the world. He was stopped by Korra less than two weeks after entering the physical world.
- Hundun is named after a chaotic entity in Chinese mythology.
- Hundun's character design was handled by artists at PlatinumGames in Japan.
- He is the second enemy Korra's faced to come from the Spirit World.