But probably the biggest change this season that propels the plot is that people start getting the ability to airbend again, which actually impacts Korra since the main antagonist this season, Zeheer (Voice by Henry freaking Rollins) acquires airbending abilities, too.
He also eventually helps break other powerful benders out of captivity to form a group called “The Red Lotus.”
And the ramifications of what happened in Book 2 concerning the Spirit Realm seep into this season, as spirit vines are popping up all over Republic City.
Book 3, which, during its initial run was first on Nickeloeon proper, and then concluded on Nick.com because of the show’s declining ratings, is the series’ best season since so much happens.